General and efficient synthesis of 2,3-unsubstituted indoles catalyzed by acidic mesoporous molecular sieves
摘要:
A general and efficient method for the synthesis of 2,3-unsubstituted indoles has been established by the intramolecular cyclization of N-benzyl 2-anilinoacetals. Acidic mesoporous molecular sieve (MCM-41-SO3H) has shown excellent catalytic activity on this transformation, and the 2,3-unsubstituted indoles bearing 7-substituent or strong electron-withdrawing substituents also could be achieved by this protocol. Moreover, the heterogeneous catalyst, MCM-41-SO3H, could be conveniently recovered and reused without obvious loss of the catalytic activity. This work will provide an economic and environmental-benign method for the construction of various indole derivatives. (C) 2013 Elsevier Ltd. All rights reserved.
[EN] INDOLE-3-METHANAMINES USEFUL AS ANTI-DIABETIC, ANTI-OBESITY AND ANTI-ATHEROSCLEROTIC AGENTS
申请人:THE UPJOHN COMPANY
公开号:WO1992007829A1
公开(公告)日:1992-05-14
(EN) The present invention provides novel compounds which are useful in the treatment of NIDDM, obesity, hypertension or atherosclerosis. This invention encompasses a compound of formula (I), wherein R1-R6 represent a variety of substituents, and a method of treatment of the above conditions.(FR) Nouveaux composés utilisés dans le traitement du diabète sucré indépendant de l'insuline (NIDDM), de l'obésité, de l'hypertension ou de l'athérosclérose. L'invention comprend un composé de formule (I), dans laquelle R1-R6 représentent toute une variété de substituants, ainsi qu'un procédé de traitement des conditions pathologiques susmentionnées.