Total synthesis of halipeptins A and D and analogues was written by Nicolaou, K. C.;Kim, David W.;Schlawe, Daniel;Lizos, Dimitrios E.;de Noronha, Rita G.;Longbottom, Deborah A.. And the article was included in Angewandte Chemie, International Edition in 2005.Category: triazoles The following contents are mentioned in the article:
Deceptive rings: Halipeptins A I (R2 = CH2OH) and D I (R2 = Me) and analogs thereof were synthesized from azide fragment II and ester fragment III (R = OSiPh2CMe3, H, resp.). Key steps included peptide-bond formation, DAST-induced thiazoline construction, and macrolactamization. Unlike the naturally isolated (and possibly contaminated) material, synthetic halipeptin D exhibited only weak toxicity against tumor cells. This study involved multiple reactions and reactants, such as ((3H-[1,2,3]Triazolo[4,5-b]pyridin-3-yl)oxy)tri(pyrrolidin-1-yl)phosphonium hexafluorophosphate(V) (cas: 156311-83-0Category: triazoles).
((3H-[1,2,3]Triazolo[4,5-b]pyridin-3-yl)oxy)tri(pyrrolidin-1-yl)phosphonium hexafluorophosphate(V) (cas: 156311-83-0) belongs to triazole derivatives. Triazoles are important five-member nitrogen heterocycles involved in a wide range of industrial applications such as agrochemicals, corrosion inhibitors, dyes, optical brighteners, as well as biologically active agents. 1,2,3-Triazoles are usually prepared following (3+2) cycloaddition protocols. A common technique for unsubstituted triazoles is the Huisgen azide-alkyne 1,3-dipolar cycloaddition: a azide and an alkyne react at high temperature to form a ring. However, the Huisgen strategy produces a mixture of isomers (typically 1,4- and 1,5-disubstituted) when used to produce substituted triazoles.Category: triazoles
Referemce:
1,2,3-Triazole – Wikipedia,
Triazoles – an overview | ScienceDirect Topics