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The Best Chemistry compound: 5-Bromo-1H-1,2,4-triazole

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Reference of 7343-33-1, New Advances in Chemical Research in 2021. The transformation of simple hydrocarbons into more complex and valuable products via catalytic C–H bond functionalisation has revolutionised modern synthetic chemistry. 7343-33-1, name is 5-Bromo-1H-1,2,4-triazole, molecular formula is C2H2BrN3, its traditional synthetic route has been very mature, but the traditional synthetic route has various shortcomings, below Introduce a new synthetic route.

(f?)-2-(6-Fluoroimidazo[1 ,2-a]pyridin-3-yl)-N-(piperidin-3-yl)pyrimidin-4-amine (42 mg, 0.13 mmol, Preparation 9b) and 3-bromo-1 H-1 ,2,4-triazole (10 mg, 0.07 mmol, prepared as described in the J. Med. Chem. 2004, 47(19), 4645-4648) are heated overnight at 150 °C. The crude reaction mixture is directly purified by reverse phase chromatography (C-18 silica from Waters, water/1 :1 acetonitrile-methanol as eluents [0.1percent v/v formic acid buffered] 0percent to 100percent) to obtain the title compound (4 mg, 15percent) as a solid.LRMS (m/z): 380 (M+1)+.1H-NMR delta (CDCIa): 1.8 (m, 2H), 1.9 (m, 1 H), 2.0 (m, 1 H), 3.2 (m, 1 H), 3.3 (m,1 H), 3.7 (m, 1 H), 4.1 (m, 2H), 5.2 (bs, 1 H), 6.1 (m, 1 H), 7.2 (m, 1 H), 7.6 (dd,1 H), 7.8 (m, 1 H), 8.1 (m, 1 H), 8.5 (s, 1 H), 9.8 (m, 1 H).

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Reference:
Patent; ALMIRALL, S.A.; EASTWOOD, Paul Robert; GONZALEZ RODRIGUEZ, Jacob; BACH TANA, Jordi; PAGES SANTACANA, Lluis Miquel; TALTAVULL MOLL, Joan; CATURLA JAVALOYES, Juan Francisco; MATASSA, Victor Giulio; WO2011/76419; (2011); A1;,
1,2,3-Triazole – Wikipedia,
Triazoles – an overview | ScienceDirect Topics

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New discoveries in chemical research and development in 2021. The dynamic chemical diversity of the numerous elements, ions and molecules that constitute the basis of life provides wide challenges and opportunities for research. 7343-33-1, name is 5-Bromo-1H-1,2,4-triazole belongs to triazoles compound, it is a common compound, a new synthetic route is introduced below. Product Details of 7343-33-1

A mixture of K2C03 (29.19 g, 211.2 mmol), 3-bromo-1H-1,2,4-triazole (25 g, 169.0 mmol) and 2-chloropyrazine (19.36 g, 169.0 mmol) inNMP (130 mL) was heated at 125 °C for 6 hrs. The reaction was quenched with water (300 mL) and stined for lh. The solids were collected, washed with water, ether and dried to give 2-(3-bromo-1,2,4-triazol-1-yl)pyrazine (32 g, 83.8percent). ?H NMR (300 MHz, CD3OD+CDC13) oe 9.40 – 9.05 (m, 2H), 8.70 (d, J = 2.5 Hz, 1H), 8.56 (dd, J = 2.5, 1.5 Hz, 1H) ppm. ESI-MS m/z calc. 224.97, found 226.29 (M+1)+; Retention time: 0.75 minutes

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Reference:
Patent; VERTEX PHARMACEUTICALS INCORPORATED; DAVIES, Robert, J.; CAO, Jingrong; COCKERILL, Meghan, Elise; COLLIER, Philip, Noel; DENINNO, Michael, Paul; DOYLE, Elisabeth; FRANTZ, James, Daniel; GAO, Huai; GOLDMAN, Brian, Anthony; GREY, Ronald, Lee; GRILLOT, Anne-laure; GU, Wenxin; HENDERSON, James, A.; IRARRAZAVAL, Raul Eduardo, Krauss; KOLPAK, Adrianne, Lynn; LIAO, Yusheng; MAGAVI, Sanjay Shivayogi; MALTAIS, Francois; MESSERSMITH, David; PIERCE, Albert, Charles; PEROLA, Emanuele; RYU, Elizabeth Jin-Sun; SYKEN, Joshua; WANG, Jian; (706 pag.)WO2016/197009; (2016); A1;,
1,2,3-Triazole – Wikipedia,
Triazoles – an overview | ScienceDirect Topics

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Electric Literature of 7343-33-1, New Advances in Chemical Research in 2021. Redox catalysis has been broadly utilized in electrochemical synthesis due to its kinetic advantages over direct electrolysis. 7343-33-1, name is 5-Bromo-1H-1,2,4-triazole, molecular formula is C2H2BrN3, its traditional synthetic route has been very mature, but the traditional synthetic route has various shortcomings, below Introduce a new synthetic route.

2 – (6 – chloro – 3 – ethanesulfonyl – pyridin – 2 – yl) – 3 – methyl – 6 – trifluoromethyl – 3 H – imidazo [4,5 – b] pyridine300 mg,Potassium carbonate133 mg, and N, N-dimethylformamide 3 mL, 3-boule132 mg of lomo-1 H-1,2,4-triazole was added. And the mixture was stirred for 2.5 hours under ice coolingAfter that, a saturated multilayer aqueous solution was added to the reaction mixture, and the mixture was extracted with ethyl acetate. Water and saturated organic layerWashed with Japanese salt water, and dried with anhydrous sodium sulfate. The obtained organic layer was dried under reduced pressure.The obtained residue was subjected to silica gel chromatography, and the following compound 3 described below was separated by 370 mg.

Reference:
Patent; SUMITOMO CHEMICAL COMPANY LIMITED; NISHIGUCHI, NAONOBU; SUNAMURA, EIRIKI; (25 pag.)JP2017/52702; (2017); A;,
1,2,3-Triazole – Wikipedia,
Triazoles – an overview | ScienceDirect Topics

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[00464j To a 1OOml flask was added 3-bromo-1H-i,2,4-triazole (739.8 mg, 5 mmol), CuT (95.2 mg, 0.50 mmol) and Cs2C03 (1.629 g, 5.0 mmol) and the flask was evacuated thenbackfilled with N2 before adding DMS0 (5 mL) and i-fluoro-3-iodo-5-methyl-benzene (590.1 mg, 2.50 mmol). The reaction mixture was heated at 100°C for 20h at which time LCMSindicated the major peak was desired product. To the reaction mixture was added Et0Ac, the mixture was filtered through celite and to the filtrate was added brine. The organic phase wasdried over MgS04, filtered, evaporated to dryness and purified on an Isco 40g silica gel column eluting with heptanes and ethyl acetate to afford 3-bromo-i-(3-fluoro-5-methyl-phenyl)-i,2,4-triazole HG-3a (170 mg, 26.6percent). ?H NMR (300 MHz, CDC13) oe 8.43 (s, 1H), 7.29 (d, J = 2.7 Hz, 1H), 7.23 (dt, J = 9.0, 2.0 Hz, 1H), 6.97 (d, J = 9.1 Hz, 1H), 2.46 (s, 3H)ppm. ESI-MS m/z calc. 254.98074, found 257.97 (M+i) Retention time: 0.81 minutes.

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New discoveries in chemical research and development in 2021. The transformation of simple hydrocarbons into more complex and valuable products via catalytic C–H bond functionalisation has revolutionised modern synthetic chemistry. 7343-33-1, name is 5-Bromo-1H-1,2,4-triazole belongs to triazoles compound, it is a common compound, a new synthetic route is introduced below. Application In Synthesis of 5-Bromo-1H-1,2,4-triazole

To a suspension of 3-bromo-1H-1,2,4-triazole (5.0 g, 34 mmol) and cesiumcarbonate (11 g, 34 mmol) in acetonitrile (50 mL) was added 1,1,1-trifluoro-4-iodobutane (6.8 mL, 34 mmol). The solution was stirred at room temperature for 72 hours. The solution was poured into water (50 mL) and extracted with diethyl ether (2 x 100 mL). The combined organic layers were concentrated. Purification by flash column chromatography using 0-20percent ethyl acetate/hexanes as eluent, provided the titlecompound as a 70:30 mixture of isomers (3.2 g, 37percent). The mixture was used in the next step without further purification; Prepared using 4,4,5,5,5-pentafluoropentyl methanesulfonate and isolated as a light-brown liquid (3.5 g, 49percent): 1H NMR (400 MHz, CDCI3) O 7.90 (s, 1H), 4.32 – 4.30 (m, 2H), 2.27 – 2.00 (m, 4H); ESIMS m/z 308 ([M+H]).

I hope this article can help some friends in scientific research. I am very proud of our efforts over the past few months and hope to 5-Bromo-1H-1,2,4-triazole help many people in the next few years.

Reference:
Patent; DOW AGROSCIENCES LLC; GIAMPIETRO, Natalie C.; CROUSE, Gary D.; SPARKS, Thomas C.; (131 pag.)WO2017/40060; (2017); A1;,
1,2,3-Triazole – Wikipedia,
Triazoles – an overview | ScienceDirect Topics

What Kind of Chemistry Facts Are We Going to Learn About 7343-33-1

We’ll also look at important developments in the pharmaceutical industry because understanding organic chemistry is important in understanding health, medicine, the role of 5-Bromo-1H-1,2,4-triazole ,and how the biochemistry of the body works.

New discoveries in chemical research and development in 2021. As an important bridge between the micro and macro material world, chemistry is one of the main methods and means for humans to understand and transform the material world.7343-33-1, name is 5-Bromo-1H-1,2,4-triazole belongs to triazoles compound, it is a common compound, a new synthetic route is introduced below. category: Triazoles

To a suspension of 3-bromo-1H-i,2,4-triazole (lOg, 67.6mM) and phenylboronic acid (16.5g, 135.2mM) in 500 mL of DCM, was added the following: pyridine; (i0.9mL, i0.7g, 135.2mM), copper (II) acetate; (1 8.4g, 101.5mM) and powdered 4A molecular sieves (45g). The resulting blue colored suspension was stined at room temperature for 10 days open to the air. Additional DCM (500mL) was added to the reaction and the mixture filtered through a pad of diatomaceous earth, washing the cake with DCM, 10percent MeOH/DCM, and finally DCM. The filtrates were collected and concentrated under reduced pressure to provide a viscous residue, which was partitioned between ethyl acetate and iN HC1. The organic phase was washed with water (2x), brine (ix) then dried over anhydrous sodium sulphate. Suction filtered the organic layer to remove particulates and evaporated under reduced pressure to give the crude product which was purified on CombiFlash (240g column) 5i02 eluting with 25percent ethyl acetate /heptanes. Combined clean fractions and reduced the volume of the fractions under reduced pressure until crystals formed. Isolated crystals via suction filtration, washed with additional heptanes and air dried to yield 3-bromo-i-phenyl-1H-i,2,4-triazole as a white crystalline solid (5.ig, 34percent yield). ?H NMR (400 MHz, DMSO-d6) oe 9.32(s, 1H), 7.92 – 7.79 (m, 2H), 7.58 (dd, J=ii.3, 4.5Hz, 2H), 7.51-7.41 (m, 1H) ppm. ESI-MS m/z calc. 222.9745, found 224.0 (M+i)+; Retention time: 0.75 minutes.

Brief introduction of 7343-33-1

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Method 1: Diacetoxycopper (2.30 g, 12.7 mmol), 3,5-difluorophenyl-boronic acid (1.60 g, 10.1 mmol), 3-bromo-1H-1,2,4-triazole (1.25 g, 8.4 mmol) and 4A molecular sieve (150mg) were mixed in DCM (50 mL), and pyridine (1.3 mL, 16.90 mmol) was added. The mixture was stined at RT under air for 3 days. LCMS showed that no starting material remained and desired product was formed. The reaction was filtered through a plug of Celite via suction and the solid was washed with additional DCM (200m1). The combined organic layer was washed with 0.1 N aqueous HC1 three times (50 ml x 3) and brine (200 ml). The organic layer was concentrated and purified on silica gel (120 g column, dry loading method on Celite) using 10-90percent EtOAc:Hexanes to afford 1.23 g (50percent) of desired product JW-lc. ?H NMR (400 MHz, DMSO-d6) oe 9.40 (s, 1H), 7.78 – 7.61 (m, 2H), 7.41 (tt, J = 9.3, 2.3 Hz, 1H) ppm. ESI-MS m/z calc. 258.95566, found 260.05 (M+1)+; Retention time: 0.8 minutes.

Our Top Choice Compound: 7343-33-1

To a reaction vial were added 2-bromo-5-(trifluoromethoxy)pyridine ( 1.0 g, 4.1 mmol) and 3-bromo- l – -l,2,4-triazole (0.91 g, 6.2 mmol). Lambda ,/V-Dimethylformamide (16 ml_) and cesium carbonate (2.6 g, 8.2 mmol) were added, and the vial was degassed for 5 minutes with argon. Copper(I) iodide (0.077 g, 0.41 mmol) was added, and the via l was further degassed for 5 minutes with argon. The vial was capped and heated at 100 C for 1 hour in a Biotage Initiator microwave reactor, with external IR-sensor temperature monitoring from the side of the vessel. The reaction mixture was cooled to room temperature, poured onto crushed ice (3 volumes), and extracted with ethyl acetate (3 x 150 ml_). The combined organic layers were dried over sodium sulfate, filtered, and concentrated. Purification by flash column chromatography using 0-40% ethyl acetate/hexanes as eluent provided the title compound as a pale brown liquid (0.40 g, 31%) : *H N MR (400 MHz, CDCI3) delta 9.01 (s, 1H), 8.39 (d, J = 2.4 Hz, 1H), 7.94 (d, J = 8.8 Hz, 1H), 7.77 (dd, J = 1.6 Hz, 8.8Hz, 1H) ; ESIMS m/z 309 ([M + H]+).

Reference:
Patent; DOW AGROSCIENCES LLC; GIAMPIETRO, Natalie C.; CROUSE, Gary D.; SPARKS, Thomas C.; DEMETER, David A.; (242 pag.)WO2017/40742; (2017); A1;,
1,2,3-Triazole – Wikipedia,
Triazoles – an overview | ScienceDirect Topics

What Kind of Chemistry Facts Are We Going to Learn About 7343-33-1

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Application of 7343-33-1, New Advances in Chemical Research in 2021. Redox catalysis has been broadly utilized in electrochemical synthesis due to its kinetic advantages over direct electrolysis. 7343-33-1, name is 5-Bromo-1H-1,2,4-triazole, molecular formula is C2H2BrN3, its traditional synthetic route has been very mature, but the traditional synthetic route has various shortcomings, below Introduce a new synthetic route.

A dry round bottom flask was charged with potassium phosphate (K3PO4, 7.74 g, 36.5 mmol), CuI (0.165 g, 0.868 mmol), and 3-bromo-1H-1,2,4-triazole (2.83 g, 19.10 mmol). The flask was evacuated/backfilled with N2 (3*). DMF (34.7 ml) was added, followed by trans-(1R,2R)-N,N’-bismethyl-1,2-cyclohexane diamine (0.274 ml, 1.736 mmol) and 1-iodo-4-(trifluoromethoxy)benzene (5 g, 17.36 mmol). The solution was heated to 110° C. After 48 h, the reaction mixture was cooled to RT, diluted with EtOAc and filtered through Celite®. The filtrate was washed with water (100 mL) containing 10 mL 1 M HCl. The organics were separated, and the aqueous phase was further extracted with EtOAc (3*). The organics were combined, dried, and concentrated in vacuo. Purification via flash column chromatography (EtOAc/hexanes) yielded the title compound as a tan solid (1.86 g, 34percent): 1H NMR (400 MHz, CDCl3) delta 8.44 (s, 1H), 7.70 (d, J=8.9 Hz, 2H), 7.38 (d, J=8.5 Hz, 2H); 19F NMR (376 MHz, CDCl3) delta -58.04; EIMS m/z 307 ([M]+).

In the meantime we’ve collected together some recent articles in this area about 5-Bromo-1H-1,2,4-triazole to whet your appetite. Happy reading!

Reference:
Patent; Dow AgroSciences LLC; GIAMPIETRO, Natalie C.; DENT, III, William Hunter; US2014/275565; (2014); A1;,
1,2,3-Triazole – Wikipedia,
Triazoles – an overview | ScienceDirect Topics

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The potential utility of systematic synthetic strategy will be applicable to efficient generations of chemical libraries of compounds to find ‘hit’ molecules.Read on for other articles about 5-Bromo-1H-1,2,4-triazole, hurry up and to see.

Reference of 7343-33-1, New Advances in Chemical Research in 2021. The dynamic chemical diversity of the numerous elements, ions and molecules that constitute the basis of life provides wide challenges and opportunities for research. 7343-33-1, name is 5-Bromo-1H-1,2,4-triazole, molecular formula is C2H2BrN3, its traditional synthetic route has been very mature, but the traditional synthetic route has various shortcomings, below Introduce a new synthetic route.

EXAMPLE 6 fPROCEDURES)(1 S,4a/?,6aS,7/?,8/?, 1 Oa/?, 10b/?, 12a/?, 1 AR, 15R)- 15-[[(2/?)-2-amino-2,3- dimethylbutyl]oxy]-14-(3-bromo-4H-l,2,4-triazol-4-yl)-8-[(l/?)-l,2-dimethylpropyl]-1 ,6,6a,7,8,9, 10, 10a, 10b, 11 , 12, 12a-dodecahydro- 1 ,6a,8, 10a-tetramethyl-4//- 1 ,4a-propano-2H- phenanthro[l,2-c]pyran-7-carboxylic acid (EXAMPLE 6A) and(1 S,4a/?,6aS,7/?,8/?, 1 Oa/?, 10b/?, 12a/?, 14/?, 15R)- 15-[[(2/?)-2-amino-2,3- dimethylbutyl]oxy]-14-(5-bromo-/H-l,2,4-triazol-l-yl)-8-[(l/?)-l,2-dimethylpropyl]-1 ,6,6a,7,8,9, 10, 10a, 10b, 11 , 12, 12a-dodecahydro- 1 ,6a,8, 1 Oa-tetramethyl-4//- 1 ,4a-propano-2H- phenanthro[l,2-c]pyran-7-carboxylic acid (EXAMPLE 6B) and( 1 S,4aR,6aS,7R,8R, 1 Oa/?, 1 Obi?, 12aK, 1 AR, 15R)- 15-[[(2i?)-2-amino-2,3- dimethylbutyl]oxy]-14-(3-bromo-7H-l,2,4-triazol-l-yl)-8-[(li?)-l,2-dimethylpropyl]- 1 ,6,6a,7,8,9, 10, 1 Oa, 1 Ob, 11 , 12, 12a-dodecahydro- 1 ,6a,8, 1 Oa-tetramethyl-^H- 1 ,4a-propano-2H- phenanthro[l,2-c]pyran-7-carboxylic acid (EXAMPLE 6C)3-bromo-lH-l,2,4-triazole (32.1 mg, 0.217 mmol) and BF3OEt2 (54 mul, 0.426 mmol) were added to a stirred solution of Intermediate 6 (26.0 mg, 0.043 mmol) in 1,2- dichloroethane (0.43 ml). The reaction mixture was a light yellow solution that was heated to 5O0C. After 1.75 hr, LCMS and 1H NMR showed complete consumption of Intermediate 6. The reaction mixture was cooled to room temperature, the solvent was evaporated, and the resulting residue was placed under high vacuum. The residue was dissolved in methanol and separated using a single HPLC run on a 19 x 150 mm Sunfire Prep Cl 8 OBD 10 mum column by eluting with acetonitrile/water + 0.1percent TFA. The HPLC fractions containing the fastest eluting regioisomer were combined, the solvent was evaporated under reduced pressure, and the residue was lyophilized from ethanol and benzene to give EXAMPLE 6A (3.6 mg) as a white solid. The HPLC fractions containing the second eluting regioisomer were combined, the solvent was evaporated under reduced pressure, and the residue was lyophilized from ethanol and benzene to give EXAMPLE 6B (13.1 mg) as a white solid. The HPLC fractions containing the slowest eluting regioisomer were combined, the solvent was evaporated under reduced pressure, and the residue was lyophilized from ethanol and benzene to give EXAMPLE 6C (5.8 mg) as a white solid.EXAMPLE 6A: 1H NMR (CD3OD, 600 MHz, ppm) delta 0.76 (s, 3H, Me), 0.76 (d, 3H, Me), 0.81 (d,3H, Me), 0.84 (d, 3H, Me), 0.85 (d, 3H, Me), 0.88 (s, 3H, Me), 0.89 (d, 3H, Me), 0.94 (s, 3H, Me), 1.16 (s, 3H, Me), 1.20 (s, 3H, Me), 1.22-1.35 (m), 1.40-1.44 (m), 1.46-1.65 (m), 1.73-1.96 (m), 2.11-2.22 (m), 2.43 (broad dd, IH, H13), 2.79 (broad d, IH), 2.84 (s, IH, H7), 3.49 (d, IH), 3.53 (d, 2H), 3.60 (d, IH), 3.73 (broad d, IH), 3.94 (d, IH), 5.50 (dd, IH, H5), 5.72-5.80 (broad m, IH, H 14), 9.29 (broad s, IH, triazole).Mass Spectrum: (ESI) m/z = 717.32 (719.32) (M+H).EXAMPLE 6B:1H NMR (CD3OD, 600 MHz, ppm) delta 0.75 (s, 3H, Me), 0.76 (d, 3H, Me), 0.79 (d, 3H, Me), 0.83 (d, 3H, Me), 0.84 (d, 3H, Me), 0.88 (s, 3H, Me), 0.89 (d, 3H, Me), 0.91 (s, 3H, Me), 1.13 (s, 3H, Me), 1.19 (s, 3H, Me), 1.22-1.34 (m), 1.39-1.43 (m), 1.46-1.56 (m), 1.58-1.64 (m), 1.72-1.95 (m), 2.09-2.21 (m), 2.30 (dd, IH, H13), 2.83 (s, IH, H7), 2.85 (d, IH), 3.48 (d, IH), 3.48 (d, IH), 3.54 (dd, IH), 3.60 (d, IH), 3.88 (d, IH), 3.95 (d, IH), 5.47 (dd, IH, H5), 5.71-5.77 (m, IH, H14), 8.10 (s, IH, triazole). Mass Spectrum: (ESI) m/z = 717.32 (719.32) (M+H).EXAMPLE 6C:1H NMR (CD3OD, 600 MHz, ppm) delta 0.76 (s, 3H, Me), 0.77 (d, 3H, Me), 0.82 (d, 3H, Me), 0.85 (d, 3H, Me), 0.86 (s, 3H, Me), 0.86 (d, 3H, Me), 0.89 (d, 3H, Me), 0.92 (s, 3H, Me), 1.16 (s, 3H, Me), 1.20 (s, 3H, Me), 1.22-1.34 (m), 1.39-1.44 (m), 1.48-1.65 (m), 1.76-1.96 (m), 2.11-2.22 (m), 2.41 (dd, IH, H13), 2.72 (d, IH), 2.84 (s, IH, H7), 3.47 (d, IH), 3.50 (d, IH), 3.52 (dd, IH), 3.58 (d, IH), 3.72 (d, IH), 3.91 (d, IH), 5.48 (dd, IH, H5), 5.51-5.57 (m, IH, H 14), 8.52 (s, IH, triazole).Mass Spectrum: (ESI) m/z = 717.32 (719.32) (M+H).

Reference:
Patent; MERCK SHARP & DOHME CORP.; GREENLEE, Mark, L.; WILKENING, Robert; APGAR, James; WILDONGER, Kenneth, James; MENG, Dongfang; PARKER, Dann, L.; WO2010/19203; (2010); A1;,
1,2,3-Triazole – Wikipedia,
Triazoles – an overview | ScienceDirect Topics