Chiral epoxides as a source of chiral β-oxidofunctionalised organolithium compounds: Reaction with electrophiles
作者:Abderrazak Bachki、Francisco Foubelo、Miguel Yus
DOI:10.1016/0957-4166(96)00390-4
日期:1996.10
The reductive opening of chiral epoxides 1, 4, 7 and 11 with lithium powder and a catalytic amount of DTBB (5 mol %) in THF at -78 degrees C, followed by treatment with different electrophiles [Bu(t)CHO, PhCHO, (CH2)(5)CO, PhCOMe, CO2, H2O, D2O,] at the same temperature leads, after hydrolysis with water, to enantiomerically pure functionalised alcohols 3, 6, 9, 10 and 13. Monoprotected diols 6 and 10 give 1,2,4-triols 14 after treatment under acidic conditions in methanol, in almost quantitative yield. Copyright (C) 1996 Elsevier Science Ltd