Annulation of Enals with Carbamoylpropiolates via NHC-Catalyzed Enolate Pathway: Access to Functionalized Maleimides/Iso-maleimides and Synthesis of Aspergillus FH-X-213
作者:Amol B. Viveki、Mahesh D. Pol、Priyanka Halder、Sameer R. Sonavane、Santosh B. Mhaske
DOI:10.1021/acs.joc.1c00782
日期:2021.7.16
report the N-heterocyclic carbene (NHC)-catalyzed [3 + 2] annulation of α,β-unsaturated aldehydes with carbamoylpropiolates via an unusual enolate pathway leading to the construction of highly functionalized maleimides or isomaleimides. The electronic effect imposed by the alkyl/aryl group present on the amide nitrogen of carbamoylpropiolates plays a crucial role in the selective formation of these
[EN] FUNCTIONALIZED MALEIMIDES AND ISOMALEIMIDES AND A PROCESS FOR PREPARATION THEREOF<br/>[FR] MALÉIMIDES ET ISOMALÉIMIDES FONCTIONNALISÉS ET LEUR PROCÉDÉ DE PRÉPARATION
申请人:[en]COUNCIL OF SCIENTIFIC AND INDUSTRIAL RESEARCH
公开号:WO2022259266A1
公开(公告)日:2022-12-15
The present invention relates to functionalized Maleimides and Isomaleimides of general Formula (I) and a process for the preparation thereof, involving [3+2] annulation of α, β-5 unsaturated aldehydes with carbamoyl alkylates via an enolate pathway to afford highly functionalized compounds of Formula (I);
Divergent Synthesis of Oxindolylidene Acetates and Spirooxindolopyrrolidones from Arynes
作者:Virat G. Pandya、Santosh B. Mhaske
DOI:10.1021/acs.orglett.7b03661
日期:2018.3.16
A novel process for the preparation of various (E)-oxindolylidene acetates using arynes and carbamoylpropiolates has been developed. The utility of this protocol is also further extended to the one-pot synthesis of complex spirooxindolopyrrolidones. This method provides a milder and transition-metal-free access to both of the target scaffolds in moderate to good yields.