Enantioselective Synthesis of Chiral Substituted 2,4-Diketoimidazolidines and 2,5-Diketopiperazines via Asymmetric Hydrogenation
作者:Guiying Xiao、Shuang Xu、Chaochao Xie、Guofu Zi、Weiping Ye、Zhangtao Zhou、Guohua Hou、Zhanbin Zhang
DOI:10.1021/acs.orglett.1c01894
日期:2021.8.6
An enantioselective hydrogenation of 5-alkylidene-2,4-diketoimidazolidines (hydantoins) and 3-alkylidene-2,5-ketopiperazines catalyzed by the Rh/f-spiroPhos complex under mild conditions has been developed, which provides an efficient approach to the highly enantioselective synthesis of chiral hydantoins and 2,5-ketopiperazine derivatives with high enantioselectivities up to 99.9% ee.
已经开发了在温和条件下由 Rh/ f -spiroPhos 络合物催化的 5-亚烷基-2,4-二酮咪唑烷(乙内酰脲)和 3-亚烷基-2,5-酮哌嗪的对映选择性氢化,这提供了一种高效的方法。手性乙内酰脲和 2,5-酮哌嗪衍生物的对映选择性合成,对映选择性高达 99.9% ee。