SDS of cas: 56602-33-6In 2019 ,《Copper(II) Acetate Mediated Synthesis of 3-Sulfonyl-2-aryl-2H-chromenes》 was published in Synthesis. The article was written by Chang, Meng-Yang; Chen, Yu-Hsin; Chen, Han-Yu. The article contains the following contents:
This paper describes a concise, easy-operation, high-yielding method for the synthesis of 3-sulfonyl-2-aryl-2H-chromenes I [R = Me, n-Bu, 4-H3CC6H4, etc.; R1 = H; R2 = H, OCH3; R1R2 = -CH=CH-CH=CH-; R3 = H, Cl, Br; Ar = 2-furyl, 2-naphthyl, 3,4,5-(H3CO)3C6H2, etc.] by a one-pot, straightforward two-step synthetic route, which includes (i) Cu(OAc)2/PyBOP-mediated intermol. [4+2] annulation of substituted salicylic acids 2-OH-3-R1-4-R2-5-R3C6HC(O)OH with β-sulfonylstyrenes ArCH=CHS(O)2R in the presence of DMAP in refluxing DMF, and (ii) sequential O-alkylation of the resulting sulfonylflavanones II with Bu bromide. A plausible mechanism is proposed and discussed. This protocol provides a highly effective annulation via one carbon-oxygen (C-O) and one carbon-carbon (C-C) bond formations. After reading the article, we found that the author used ((1H-Benzo[d][1,2,3]triazol-1-yl)oxy)tris(dimethylamino)phosphonium hexafluorophosphate(V)(cas: 56602-33-6SDS of cas: 56602-33-6)
((1H-Benzo[d][1,2,3]triazol-1-yl)oxy)tris(dimethylamino)phosphonium hexafluorophosphate(V)(cas: 56602-33-6) is used as a reagent for peptide coupling, lactonization, selective esterification, amidation of alfa amino acids without racemization and synthesis of magnolamide for antioxidative activity and catalyst for 9-acridinecaroboxamide derivative. It is also used as a precursor for the synthesis of phenyl esters of amino acids.SDS of cas: 56602-33-6
Referemce:
1,2,3-Triazole – Wikipedia,
Triazoles – an overview | ScienceDirect Topics