Microwave-enhanced rhodium-catalyzed conjugate-addition of aryl boronic acids to unprotected maleimides
作者:Pravin S. Iyer、Meaghan M. O’Malley、Matthew C. Lucas
DOI:10.1016/j.tetlet.2007.04.084
日期:2007.6
Various boronicacids were treated with a rhodium (I) catalyst enabling their 1,4-conjugate addition to unprotected maleimide. The scope of the reaction was explored to include both electron-rich and electron poor boronicacids. These reactions were also performed in the microwave resulting in reduced reaction times and improved efficiencies. Additionally, substrates that were recalcitrant under conventional
A variety of 3-phenylpyrrolidines were synthesized and evaluated for their dopamine binding affinity in rat striatal tissue in vitro using [H-3] SCH 23390 and [H-3] spiperone as the D1 and D2 selective radioligands, respectively. Maximal D1 and D2 receptor binding affinity occurs with a n-pentyl group on the pyrrolidine ring nitrogen. Introduction of a trans methyl group at the 4-position of the ring decreases both D1 and D2 binding affinity. However, a cis 4-methyl group increases D1 receptor selectivity when the pyrrolidine ring is substituted with a n-propyl group. 3-Phenylpyrrolidines having a catechol nucleus exhibit greater affinity at both D1 and D2 receptors than meta-hydroxyphenyl derivatives.
CRIDER, A. MICHAEL;SYLVESTRI, SUSAN C.;TSCHAPPAT, KATHRYN D.;DICK, RONALD+, J. HETEROCYCL. CHEM., 25,(1988) N, C. 1407-1412
作者:CRIDER, A. MICHAEL、SYLVESTRI, SUSAN C.、TSCHAPPAT, KATHRYN D.、DICK, RONALD+
DOI:——
日期:——
PIPERIDINES AND PYRROLIDINES
申请人:MERCK PATENT GmbH
公开号:EP0898569A1
公开(公告)日:1999-03-03
[EN] PIPERIDINES AND PYRROLIDINES<br/>[FR] PIPERIDINES ET PYRROLIDINES
申请人:MERCK PATENT GMBH
公开号:WO1997040038A1
公开(公告)日:1997-10-30
(EN) The invention relates to novel piperidine and pyrrolidine derivatives of formula (I) in which R1, R2, R3, k, l, m and n have the meanings indicated in Claim 1, and their salts, novel intermediates and processes for the preparation of the compounds according to the invention. The compounds of formula (I) act as 5-HT1A receptor antagonists and exhibit 5-HT reuptake-inhibiting actions and can be used for the production of medicaments.(FR) L'invention se rapporte à de nouveaux dérivés de pipéridine et pyrrolidine de la formule (I) dans laquelle R1, R2, R3, k, l, m et n ont les significations reportées dans la revendication 1, et à leurs sels. L'invention se rapporte également à de nouveaux intermédiaires et aux processus de préparation de ces composés. Les composés de la formule (I) font office d'antagonistes du récepteur 5-HT1A, ils présentent des actions inhibitrices du recaptage de 5-HT, et peuvent être utilisés dans la fabrication de médicaments.