Development of the Suzuki−Miyaura Cross-Coupling Reaction: Use of Air-Stable Potassium Alkynyltrifluoroborates in Aryl Alkynylations
作者:Gary A. Molander、Bryson W. Katona、Fouzia Machrouhi
DOI:10.1021/jo0262356
日期:2002.11.1
cross-coupling reaction of potassiumalkynyltrifluoroborates with aryl halides or triflates proceeds readily with moderate to excellent yields. The potassiumalkynyltrifluoroborates are air- and moisture-stable crystalline solids that can be stored indefinitely, which will provide an advantage in applications to combinatorial chemistry. The alkynyl cross-coupling reaction can be effected using 9 mol % of PdCl2(dppf)
Conjugated imines and iminium salts as versatile acceptors of nucleophiles
作者:Makoto Shimizu、Iwao Hachiya、Isao Mizota
DOI:10.1039/b814930e
日期:——
development of synthetic methodologies where nucleophilicaddition reactions to imino carbons are utilized in crucial steps. This article summarizes double nucleophilicaddition reactions with alpha,beta-unsaturated aldimines, addition reactions using alkynyl imines, "umpoled" reactions of alpha-imino esters, and the use of iminium salts as reactive electrophiles.
Remarkable Synthesis of 2-(<i>Z</i>)-6-(<i>E</i>)-4<i>H</i>-[1,4]-Thiazepin-5-ones by Zwitterionic Rhodium-Catalyzed Chemo- and Regioselective Cyclohydrocarbonylative Ring Expansion of Acetylenic Thiazoles
作者:Bernard G. Van den Hoven、Howard Alper
DOI:10.1021/ja003085c
日期:2001.2.1
Cyclohydrocarbonylative ring expansion of acetylenic thiazoles in the presence of CO, H(2), and catalytic quantities of the zwitterionic rhodium complex (eta(6)-C(6)H(5)BPh(3))(-)Rh(+)(1,5-COD) and triphenyl phosphite affords thiazepinones in 61 to 90% yields. This novel transformation of a 5- to a 7-membered heterocycle is readily applied to acetylenic thiazoles containing hydro, alkyl, alkyl halide
Synthesis of Bicyclic Compounds Containing a 2-Pyridone Structure by Addition Reactions of Malonic Esters to Alkynylpyridines, Pyrimidine, and Thiazoles
作者:Makoto Shimizu、Iwao Hachiya、Masaki Atarashi
DOI:10.3987/com-05-s(t)54
日期:——
4H-Quinolizin-4-ones, 6H-pyrido[1,2-a]pyrimidin-6-ones, and 5H-thiazolo[3,2-a]pyridin-5-ones were prepared by addition reactions of malonicesters to 2-alkynylpyridines, pyrimidine, and thiazoles.
通过丙二酸酯与 2 -炔基吡啶、嘧啶和噻唑。
Substituted thiazole sulfonamides as antiglaucoma agents
申请人:Allergan
公开号:US05519040A1
公开(公告)日:1996-05-21
The present invention provides novel carbonic anhydrase inhibitors represented by the structural formula: ##STR1## wherein