Platinum complex catalyzed reaction of tributyltin cyanide with alkynes
摘要:
In the presence of a catalytic amount (5 mol%) of a platinum complex, tributyltin cyanide (1) reacts with dimethyl-(2a) or diethyl acetylenedicarboxylate (2b) to afford cyanostannylation adducts (3a, b) in excellent yields. The reaction proceeds highly selectively affording only a (Z)-isomer. The compounds 3a, b are novel products which possess synthetically useful cyano, alkenylstannyl and alkoxycarbonyl. functionalities in the same molecule. Two alkoxycarbonyl functionalities may be indispensable on each alkyne carbon to accomplish the cyanostannylation reaction. Reaction with terminal alkynes gave the stannylated product (6). (C) 2002 Elsevier Science B.V. All rights reserved.
[EN] SUBSTITUTED TETRAHYDROISOQUINOLINE COMPOUNDS AS FACTOR XIA INHIBITORS<br/>[FR] COMPOSÉS TÉTRAHYDROISOQUINOLINES SUBSTITUÉS EN TANT QU'INHIBITEURS DU FACTEUR XIA
申请人:BRISTOL MYERS SQUIBB CO
公开号:WO2013055984A1
公开(公告)日:2013-04-18
The present invention provides compounds of Formula (I): or stereoisomers, pharmaceutically acceptable salts thereof, wherein all of the variables are as defined herein. These compounds are inhibitors of factor XIa and/or plasma kallikrein which may be used as medicaments.
[EN] NEW TRIAZOLYL DERIVATIVES AS GABA A ALPHA5 PAM<br/>[FR] NOUVEAUX DÉRIVÉS TRIAZOLYLES UTILISÉS EN TANT QUE GABA A ALPHA5 PAM
申请人:HOFFMANN LA ROCHE
公开号:WO2021228795A1
公开(公告)日:2021-11-18
The invention provides novel compounds having the general formula (I) or (II) wherein R1, R2, R3, X, Y and Z are as described herein, compositions including the compounds and methods of using the compounds.
Direct Synthesis of Alkynylstannanes: ZnBr<sub>2</sub>Catalyst for the Reaction of Tributyltin Methoxide and Terminal Alkynes
作者:Kensuke Kiyokawa、Nodoka Tachikake、Makoto Yasuda、Akio Baba
DOI:10.1002/anie.201104208
日期:2011.10.24
Metal hopping: Various alkynylstannanes were synthesized by the directreaction of Bu3SnOMe with terminalalkynes at room temperature in the presence of a ZnBr2 catalyst. Rather than acting as a Lewis acid, ZnBr2 was transmetalated with Bu3SnOMe to give Zn(OMe)2, which is key to the catalytic reaction.