Highly efficient phosphine-catalyzed routes to α-imidoacrylates and 2,3-diimidopropanoates
作者:Anton V. Il’in、Arthur F. Gubaev、Daut R. Islamov、Karim R. Islamov、Vladimir I. Galkin
DOI:10.1007/s10593-021-02890-x
日期:2021.2
The highly efficient α- and vicinal bis-addition of cyclic imides to methyl propiolate in high yields and β-addition of these imides to α-imidoacrylates in quantitative yields is reported. These reactions offer a simple metal-free method for a gram-scale preparation of practically useful α-imidoacrylates and vicinal bisimides under mild conditions with high atom economy and selectivity.
Access to α,γ-Diamino Diacid Derivatives via Organocatalytic Asymmetric 1,4-Addition of Azlactones and Dehydroalanines
作者:Junxian Yang、Wangsheng Sun、Zeyuan He、Changjun Yu、Guangjun Bao、Yiping Li、Yuyang Liu、Liang Hong、Rui Wang
DOI:10.1021/acs.orglett.8b03020
日期:2018.11.16
functional-group-tolerant organocatalyticasymmetric 1,4-addition of azlactones and dehydroalanine is disclosed. The reaction is used for the first synthesis of chiral α,γ-diamino diacid derivatives with nonadjacent stereogenic centers in moderate to high yields, with excellent diastereo- and enantioselectivities, under the catalysis of a chiral thiourea catalyst. In addition, the reaction could be conducted