N-Heterocyclic Carbene-Promoted [4+2] Annulation of α-Chloro Hydrazones with α-Chloro Aliphatic Aldehydes to Access Enantioenriched Dihydropyridazinones
作者:Yipeng Zhou、Hongwei Zhou、Jianfeng Xu
DOI:10.1021/acs.joc.1c02581
日期:2022.3.4
α-chloro hydrazones and α-chloro aliphaticaldehydes via N-heterocycliccarbene (NHC) catalysis is outlined. These in situ-generated 1,2-diaza-1,3-dienes undergo asymmetric [4+2] annulation with NHC-bound enolates to afford the desired products bearing a stereogenic center at the C4 position. The notable features of this approach include good to excellent enantioselectivities, high functional group tolerance
[EN] ANTHELMINTIC AGENTS AND INSECTICIDAL COMPOSITIONS<br/>[FR] AGENTS ANTHELMINTIQUES ET COMPOSITIONS INSECTICIDES
申请人:UPJOHN CO
公开号:WO2004074272A1
公开(公告)日:2004-09-02
The present invention relates to novel anthelmintic and insecticidal compositions in general, and, more specifically, compositions containing triazole derivatives as active ingredients.