Direct β-Acyloxylation of Enamines via PhIO-Mediated Intermolecular Oxidative C–O Bond Formation and Its Application to the Synthesis of Oxazoles
作者:Xin Liu、Ran Cheng、Feifei Zhao、Daisy Zhang-Negrerie、Yunfei Du、Kang Zhao
DOI:10.1021/ol3025583
日期:2012.11.2
A direct β-acyloxylation of enamine compounds has been achieved by using iodosobenzene (PhIO) as an oxidant to realize the intermolecular oxidative C(sp2)-O bond formation between enamines and various carboxylic acids, including N-protected amino acids. The transformation tolerates a wide range of functional groups and furnishes a variety of β-acyloxy enamines that can be conveniently converted to
通过使用碘代苯(PhIO)作为氧化剂实现烯胺与各种羧酸(包括N保护的氨基酸)之间的分子间氧化C(sp 2)-O键形成,已实现烯胺化合物的直接β-酰氧基化。所述转化耐受宽泛的官能团并提供多种β-酰氧基烯胺,其可通过环脱水方便地转化为恶唑化合物。