Copper-Catalyzed β-Lactam Formation Initiated by 1,3-Azaprotio Transfer of Oximes and Methyl Propiolate
作者:Zhenjie Qi、Shaozhong Wang
DOI:10.1021/acs.orglett.1c01937
日期:2021.8.6
A copper(II)-catalyzed protocol to construct trans-configured β-lactams and spirocyclic β-lactams from oximes and methylpropiolate has been developed, which features excellent substrate flexibility and diastereoselectivity (up to >99:1 dr). In situ FT-IR mechanistic experiments support that ketene species might be involved in the formation of β-lactams.
已经开发了一种铜 (II) 催化的协议,用于从肟和丙炔酸甲酯构建反式配置的β-内酰胺和螺环 β-内酰胺,其具有出色的底物灵活性和非对映选择性(高达 >99:1 dr)。原位 FT-IR 机械实验支持乙烯酮物质可能参与 β-内酰胺的形成。
NOVEL METHOD FOR PRODUCING 5, 5-DISUBSTITUTED-4, 5-DIHYDROISOXAZOLE
申请人:KUMIAI CHEMICAL INDUSTRY CO., LTD.
公开号:US20210047280A1
公开(公告)日:2021-02-18
The present invention addresses the problem of providing an industrially preferable, economical, and environmentally friendly method for producing the 4,5-dihydroisoxazole represented by a formula (3).
The present invention enables the compound of a formula (3) to be produced by reacting the compound of a formula (2) according to the reaction represented by a reaction formula in the presence of an acid catalyst.
[EN] ALDEHYDE COMPOUND PRODUCTION METHOD AND DIHYDROISOXAZOLE COMPOUND PRODUCTION METHOD<br/>[FR] PROCÉDÉ DE PRODUCTION D'UN COMPOSÉ D'ALDÉHYDE ET PROCÉDÉ DE PRODUCTION D'UN COMPOSÉ DE DIHYDROISOXAZOLE<br/>[JA] アルデヒド化合物及びジヒドロイソキサゾール化合物の製造方法
申请人:[en]KUMIAI CHEMICAL INDUSTRY CO., LTD.;[ja]クミアイ化学工業株式会社