Method for preparing aromatic secondary amino compound
申请人:MITSUI TOATSU CHEMICALS, Inc.
公开号:EP0588060A2
公开(公告)日:1994-03-23
[Constitution] A method for preparing diphenylamine from cyclohexanone and aniline by adding dropwise nitrobenzene and cyclohexanone to a reaction system in which a hydrogen transfer catalyst and a sulfur-free polar solvent are present and aniline is being formed from nitrobenzene as a hydrogen acceptor.
[Effect] Diphenylamine can be obtained in a high yield under moderate reaction conditions.
Reaction of Cyclohexanone Benzylimines with Ethylidenemalonate Diesters. Diphenyl 2-Ethylidenemalonate: A Highly Electrophilic Synthetic Equivalent of Crotonic Esters
Michael alkylation of alpha-substituted and alpha,alpha'-disubstituted cyclohexanone benzylimines with ethylidenemalonate diesters was carried out for mechanistic and synthetic purposes. In the first case, an inverse regioselectivity occurred in comparison with what is generally observed since the Michael adducts resulted from alkylation of the non substituted enamine tautomer. With alpha,alpha'-disubstituted