A convenient method for replacement of the anomeric hydroxy group in carbohydrates by difluoromethyl functionality
作者:William B. Motherwell、Matthew J. Tozer、Barry C. Ross
DOI:10.1039/c39890001437
日期:——
Difluoromethylenation of carbohydrate lactones followed by catalytic hydrogenation provides a concise sequence for the title transformation.
碳水化合物内酯的二氟亚甲基化,然后催化氢化,为标题转化提供了简洁的序列。
Free radical chain reactions for the preparation of novel anomeric carbohydrate difluoromethylene -phosphonates and -phosphonothioates
作者:Timothée F. Herpin、William B. Motherwell、Brian P. Roberts、Sylvain Roland、Jean-Marc Weibel
DOI:10.1016/s0040-4020(97)10007-2
日期:1997.11
The generation of phosphonyl or thiophosphonyl radicals in the presence of carbohydrate gem-difluoenol ethers provides new routes to anomeric difluoromethylenephosphonates and difluoromethylenephosphonothioates, respectively.
Preparation of some new anomeric carbohydrate difluoromethylenephosphonates via phosphonyl radical addition to gem-difluoroenol ethers
作者:Timoth�e F. Herpin、J. Sarah Houlton、William B. Motherwell、Brian P. Roberts、Jean-Marc Weibel
DOI:10.1039/cc9960000613
日期:——
Generation of a phosphonyl radical either from diethyl phosphite, or diethyl (phenylselenyl)phosphonate in conjunction with tributylstannane, in the presence of a carbohydrate gem-difluoroenol ether provides a new route to anomeric difluoromethylenephosphonates; in the course of these reactions, some unusual stereochemical effects are observed.
MOTHERWELL, WILLIAM B.;TOZER, MATTHEW J.;ROSS, BARRY C., J. CHEM. SOC. CHEM. COMMUN.,(1989) N9, C. 1437-1439
作者:MOTHERWELL, WILLIAM B.、TOZER, MATTHEW J.、ROSS, BARRY C.
DOI:——
日期:——
A convenient strategy for replacement of the anomeric hydroxyl group by difluoromethyl functionality in carbohydrate derivatives
作者:J.Sarah Houlton、William B. Motherwell、Barry C. Ross、Matthew J. Tozer、David J. Williams、Alexandra M.Z. Slawin
DOI:10.1016/s0040-4020(01)88029-7
日期:1993.9
A series of carbohydrate gem-difluoroenol ethers are readily prepared by the reaction of the corresponding lactones with dibromodifluoromethane, tris(dimethylamino)phosphine and zinc. Subsequent catalytic hydrogenation provides difluoromethyl C-glycoside analogues in which the exocyclic oxygen atom has been replaced by a difluoromethylene unit.