A mild method for conversion of epoxides into α-chloro ketones
作者:Sushil Raina、Debnath Bhuniya、Vinod K. Singh
DOI:10.1016/s0040-4039(00)61116-4
日期:1992.9
Epoxides on treatment with DMSO, oxalyl chloride, and 10 mole % of methanol in the presence of triethylamine at −60° C are converted to α-chloro ketones in high yield.
In the presence of a catalytic amount of bis(3-methyl-2,4-pentanedionato)nickel(II) (Ni(mac)2), various glycidyl esters are converted into the corresponding glycerol monoester derivatives with molecular oxygen in good to high yields.
Reaction of epoxides with activated DMSO reagent. General method for synthesis of α-chlorocarbonyl compounds: Application in asymmetric synthesis of (3S)-2,3-oxidosqualene
作者:Sushil Raina、Vinod K. Singh
DOI:10.1016/0040-4020(94)01111-c
日期:1995.2
Reaction of a variety of epoxides with DMSO-Oxalyl chloride in the presence of a catalytic amount of methanol and a base was studied. Disubstituted epoxides gave α-chloroketones in high yields. Aliphatic terminal epoxide underwent opening reaction to provide α-chloroketone as a major product. Trisubstututed epoxides provided α-chloroketones as major products through the formation of more stable carbocation