Enantioselective Synthesis of α-Stereogenic γ-Keto Esters via Formal Umpolung
作者:G. K. Surya Prakash、Fang Wang、Zhe Zhang、Chuanfa Ni、Ralf Haiges、George A. Olah
DOI:10.1021/ol301112m
日期:2012.7.6
feasible method has been developed for the enantioselective synthesis of α-stereogenic γ-keto esters. By employing nitro(phenylsulfonyl)methane as an acyl anion equivalent, the integrated Michael addition reaction-oxidative methanolysis protocol allows the preparation of various γ-keto esters with high optical purities.
Visible-Light-Promoted Carbene Insertion and Decarbonylation for the Synthesis of α-Substituted γ-Ketoesters
作者:Weina Li、Yingying Yang、Zhiliang Tang、Xianglin Yu、Jun Lin、Yi Jin
DOI:10.1021/acs.joc.2c01552
日期:2022.10.7
a blue visible-light-promoted approach for preparing a variety of α-substituted γ-ketoester derivatives through carbene insertion and the decarbonylation of enaminones and diazoesters. These reactions use readily available starting materials and transition-metal-free, eco-friendly procedures that are amenable to gram-scale synthesis and wide functional group tolerance. This methodology may be useful