EPC-Synthesis of functionalised amides via chiral β-nitrogenated organolithium compounds
作者:Francisco Foubelo、Miguel Yus
DOI:10.1016/0957-4166(96)00382-5
日期:1996.10
The deprotonation of chiral chloroamides or carbamates 1, 4, 7, 10, 13 and 16 with n-butyllithium followed by in situ lithiation with lithium naphthalenide, both at -78 degrees C in THF, leads to the formation of the corresponding chiral dianionic intermediates, which by reaction with different electrophiles [H2O, D2O, Me(2)S(2), (CH2)(5)CO, Bu(t)CHO, PhCHO, CO2, CO(OEt)(2), BrCH(2)CO(2)Et and DCC] at -78 to 20 degrees C affords, after hydrolysis with water, the expected enantiopure compounds. Copyright (C) 1996 Elsevier Science Ltd