Process for making N-(N'-methylenepyrrolidonyl)-2-substituted anilines
申请人:GAF Corporation
公开号:US04216152A1
公开(公告)日:1980-08-05
This invention relates to an improved process for making N-(N'-methylenepyrrolidonyl)-2-substituted anilines which are useful intermediates in the synthesis of agricultural herbicides. This process of the invention comprises reacting a 2-substituted aniline with N-chloromethylpyrrolidone at about room temperature in the presence of an acid acceptor. Such room temperature alkylation of the aniline prevents excessive side reactions, particularly with a substituent in the 2-position of the aniline, such as an alkenyl group, which is sensitive to alkylating agents which require excessive heating to effective the condensation reaction.
Novel antagonists of ∝4&bgr;1 integrin and/or ∝4&bgr;7 integrin of the general Formula I: wherein R1, R2, R5, L1, L2, Rb, W and Z are as defined in any one of claims
1
to
13,
A represents —CH— or a nitrogen atom, and p is from 0 to 4.