名称:
An unusual base-dependent α-alkylation and β-elimination of tert-butyl 2-phenyl-2-oxazoline-4-carboxylate: practical synthesis of (±)-α-alkylserines and tert-butyl benzamidoacrylate
摘要:
Practical synthesis of (+/-)-alpha-alkylserines and tert-butyl benzamidoacrylate from tert-butyl 2-phenyl-2-oxazoline-4-carboxylate (6) were developed. The alpha-alkylation and beta-elimination of 6 are dramatically dependent upon base conditions. The phase-transfer catalytic condition bearing solid KOH in toluene gives alpha-alkylation (up to >99%), and t-BuOK in DMF gives beta-elimination (98%). (C) 2004 Published by Elsevier Ltd.
DOI:
10.1016/j.tet.2004.03.041