Mapping the Melatonin Receptor. 5. Melatonin Agonists and Antagonists Derived from Tetrahydrocyclopent[<i>b</i>]indoles, Tetrahydrocarbazoles and Hexahydrocyclohept[<i>b</i>]indoles
作者:David J. Davies、Peter J. Garratt、Derek A. Tocher、Stefan Vonhoff、John Davies、Muy-Teck Teh、David Sugden
DOI:10.1021/jm970246n
日期:1998.2.1
tetrahydrocarbazoles 2 (R = H) were mainly weak antagonists, while those with R = OMe were agonists. The biological behavior of the tetrahydrocarbazoles 9 (R = H) depended on R1, some being agonists and someantagonists, whereas those with R = OMe were generally agonists. Variation of the R and R1 groups in compounds of type 9 produced both agonists and antagonists. The tetrahydrocylopentaindoles 10 had similar
3-(Substituted-amino)-1,2,3,4-tetrahydrocarbazoles are prepared by reacting appropriate 4-substituted-aminocyclohexanones with a phenylhydrazine, by reacting a 3-(sulfonyloxy)-1,2,3,4-tetrahydrocarbazole with an appropriate substituted amine, or by reduction of an appropriate 3-(acylamino)-1,2,3,4-tetrahydrocarbazole. The 3-(substituted-amino)-1,2,3,4-tetrahydrocarbazoles of this invention have analgetic and psychotropic activities. Moreover, certain of these compounds also have antihistaminic activity.
[EN] SYNTHESIS OF (2-AMINO)-TETRAHYDROCARBAZOLE-PROPANOIC ACID<br/>[FR] SYNTHÈSE D'ACIDE (2-AMINO)-TÉTRAHYDROCARBAZOLE-PROPANOÏQUE
申请人:CHIRAL QUEST INC
公开号:WO2010078250A1
公开(公告)日:2010-07-08
The present invention provides a new approach to the synthesis of 2-amino-tetrahydrocarbazole-propanoic acid, a key intermediate for the synthesis of Ramatroban. More specifically, a synthesis of 2-amino-tetrahydrocarbazole- propanoic acid which includes oxidizing an aminocyclohexanol to form an aminocyclohexanone, condensing the aminocyclohexanone to form a tetrahydrocarbazole, deprotecting the tetrahydrocarbazole to yield a racemic mixture of a tetrahydrocarbazole, resolving the racemic mixture to obtain a yield mixture with an enantiomeric excess of one enantiomer over another, alkylating the excess enantiomer to yield an alkyl ester, and hydrolyzing the alkyl ester to yield 2-amino-tetrahydrocarbazole-propanoic acid.