A Novel Synthesis of 3-Aryl-5-tert-butyl-4-oxazolin-2-ones.
作者:Noriaki KUDO、Misa TANIGUCHI、Kazuo SATO
DOI:10.1248/cpb.44.699
日期:——
An efficient synthetic method for 3-aryl-5-butyl-4-oxazolin-2-ones (6) is described. The reaction of ethyl N-arylcarbamates (10) with 1-bromo-3, 3-dimethyl-2-butanone (9a) or 1-bromo-3-ethyl-3-methyl-2-pentanone (9b) using 2.2 eq of lithium bis(trimethylsilyl)amide afforded 6 in good yields. The reaction mechanisms are discussed.