Cis-selective preparation of 2,2-difluorocyclopropyl ketones via non-metal hydride reduction of 2,2-difluorocyclopropenyl ketones
作者:Zhaoyun Zheng、William R. Dolbier
DOI:10.1016/j.jfluchem.2013.02.003
日期:2013.5
Diastereoselective reduction of gem-difluorocyclopropenyl ketones was accomplished by their Brønsted acid catalyzed reactions with the non-metal based hydride transfer reagent, Hantzsch ester (diethyl 1,4-dihydro-2,6-dimethyl-3,5-pyridinedicarboxylate) (HEH). The high yield reactions produced a significantly cis-enriched product mixture, from which the cis-isomer could be readily separated by column
非对映选择性还原宝石-difluorocyclopropenyl酮是由他们的布朗斯台德酸催化的完成与所述非金属氢化物基转移试剂,汉奇酯(二乙基1,4-二氢-2,6-二甲基-3,5-吡啶)反应(HEH) 。产生的显著高产反应顺富产物混合物,从该顺式-异构体可以通过柱色谱法容易地分离。