Synthesis of Optically Active Oxazoline Derivatives via Catalytic Asymmetric Desymmetrization of 1,3-Diols
作者:Yutaro Tsuda、Masami Kuriyama、Osamu Onomura
DOI:10.1002/chem.201103800
日期:2012.2.27
oxazolines: A synthetic method to prepare optically active oxazolines through a copper‐catalyzed asymmetric desymmetrization of 1,3‐diols has been successfully developed. This reaction system tolerated a diverse range of substrates to give the desired oxazoline derivatives in good to excellent yields with high enantioselectivities (see scheme).
Practical asymmetric synthesis of α-methylserine derivatives under mild phase-transfer conditions
作者:Keiji Nakayama、Keiji Maruoka
DOI:10.1016/j.tetlet.2008.07.013
日期:2008.9
The enantioselective methylation reaction of phenyloxazoline tert-butyl ester 5 using (R)-4b as a catalyst under mild phase-transfer conditions provides optically active a-methylserine derivatives in moderate yields with high enantioselectivity. Other alpha-alkylated serine derivatives are also achievable in high yields with high enantioselectivity by using catalytic amount of (R)-4b. (C) 2008 Elsevier Ltd. All rights reserved.