Totalsynthesis of chiral difluorinated [6]-gingerol using key intermediates (R)-(+)- and (S)-(−)-ethyl 2,2-difluoro-3-hydroxyoctanoates, obtained via enzymatic resolution with olipase/4S (Rhizopus japonicus) is described.
Synthesis of stereocontrolled α,α-difluoro-β-hydroxycarbonyl materials
作者:Takeshi Kaneda、Shinya Komura、Tomoya Kitazume
DOI:10.1016/j.jfluchem.2004.09.026
日期:2005.1
Synthesis and synthetic utilities of stereocontrolled alpha, alpha-di fluoro-beta-hydroxy-gamma,delta-unsaturated carbonyl compounds via enzymatic resolution with lipase PS (Pseudomonas cepacia, Amano Pharmaceutical Co. Ltd.) or lipase MY (Candida rugosa, Meito Sangyo Co. Ltd.) were described, and then the absolute configuration of obtained chiral materials was determined by the modified Mosher's method. (C) 2004 Elsevier B.V. All rights reserved.
Oxidation of fluoroalkyl-substituted carbinols by the Dess-Martin reagent
作者:Russell J. Linderman、David M. Graves
DOI:10.1021/jo00264a029
日期:1989.2
The Mitsunobu reaction in the synthesis of α,α-difluoro-β-amino acids
作者:Natalie A. Fokina、Andrei M. Kornilov、Valery P. Kukhar
DOI:10.1016/s0022-1139(01)00430-4
日期:2001.9
A three-stage strategy is proposed to prepare alpha,alpha -difluoro-beta -amino acids starting from aldehydes and with ethyl bromodifluoroacetate as a fluorine source. The Mitsunobu reaction as a key step was studied by P-31 and F-19 NMR for alkyl- and aryl-substituted alpha,alpha -difluoro-beta -hydroxyesters and performed under optimized conditions giving the target compounds. (C) 2001 Elsevier Science B.V. All rights reserved.