Asymmetric Synthesis of New β,β-Difluorinated Cyclic Quaternary α-Amino Acid Derivatives
作者:Santos Fustero、María Sánchez-Roselló、Vanessa Rodrigo、Carlos del Pozo、Juan F. Sanz-Cervera、Antonio Simón
DOI:10.1021/ol061733c
日期:2006.8.1
The synthesis of new beta,beta-difluorinated cyclic quaternary alpha-amino acid derivatives 1 in which a ring-closing metathesis reaction (RCM) constitutes the key step is described. The approach employs imidoyl chlorides 3 as fluorinated building blocks, and the overall process involves the stereoselective creation of a quaternary stereocenter. Complete selectivity was achieved when (R)-phenylglycinol