Rh(II)-Catalyzed Ring Expansion of Cyclopropyl N-Tosylhydrazones to 1-Substituted Cyclobutenes
作者:Jingfeng Huo、Jianbo Wang、Wenbai Ouyang
DOI:10.1055/a-1995-5960
日期:——
useful synthetic intermediates as well as important motifs in functional molecules. Herein, we report a straightforward access toward monosubstituted cyclobutenes from cyclopropyl N-tosylhydrazone. 1,2-Aryl or -alkyl shift of the Rh(II) carbene intermediate plays the key role in this transformation.
申请人:SHELL INTERNATIONALE RESEARCH
MAATSCHAPPIJ B.V.
公开号:EP0346959A1
公开(公告)日:1989-12-20
The invention relates to a process for preparing a cyclobutenohaloarene comprising the steps of:
a) providing a reaction mixture comprising an organic phase and an aqueous phase, the organic phase comprising a cyclobutenoarene;
b) contacting in the organic phase the cyclobutenoarene and a halogen source under reaction conditions effective for producing a reaction product comprising the cyclobutenohaloarene and hydrogen halide and for permitting migration of the byproduct hydrogen halide into the aqueous phase; and
c) recovering the cyclobutenohaloarene from the organic phase.
本发明涉及一种制备环丁烯光卤烯的工艺,包括以下步骤
a) 提供包括有机相和水相的反应混合物,有机相包括环丁烯炔;
b) 在有机相中,使环丁烯烯烃和卤素源在有效的反应条件下接触,以产生由环丁烯 卤烯烃和卤化氢组成的反应产物,并允许副产物卤化氢迁移到水相;以及
c) 从有机相中回收环丁烯光卤烯。
Cobalt-Catalyzed Nitrogen Atom Insertion in Arylcycloalkenes