Preparation of α-Amino Acids by Oxidative Oxazoline-Oxazinone Rearrangement-Hydrogenation (OOOH). Scope and Limitations
作者:Chaomin Liu、Tadeusz F. Molinski
DOI:10.1002/asia.201100452
日期:2011.8.1
The range and scope of the oxidative oxazoline–oxazinone rearrangement–hydrogenation sequence (OOOH)—a short, direct asymmetric synthesis of α‐amino acids from carboxylic acids—was explored. The highest yet reported diastereoselectivity for hydrogenation of the oxazinone CN bond (d.r.=>80:1) is disclosed and rationalized with the aid of ab initio molecular calculations.