Enantioselective synthesis of quaternary 3,4-dihydroisoquinolinones<i>via</i>Heck carbonylation reactions: development and application to the synthesis of Minalrestat analogues
Minalrestat and its analogues represent structurally novel aldose reductase inhibitors, and the asymmetric synthesis of such pharmaceutically privileged molecules has not been reported yet. We have developed a palladium-catalyzed enantioselective intramolecular carbonylative Heck reaction by using formate esters as the source of CO, which represents the first enantioselective synthesis of quaternary
Palladium-Catalyzed Disilylation and Digermanylation of Alkene Tethered Aryl Halides: Direct Access to Versatile Silylated and Germanylated Heterocycles
作者:Marco Wollenburg、Jonathan Bajohr、Austin D. Marchese、Andrew Whyte、Frank Glorius、Mark Lautens
DOI:10.1021/acs.orglett.0c01169
日期:2020.5.1
A method for the palladium-catalyzed disilylation and digermanylation of aryl halides bearing a tethered alkene has been developed. The mechanism is thought to proceed via Heck-type cyclization, followed by C-H activation, resulting in a reactive fused-palladacycle. A wide variety of disilylated and digermanylated heterocycles are obtained from readily available aryl halides in high yields with various
Stereoselective Three‐Component Construction of Conjugated 1,3‐Dienes
<i>via</i>
Palladium‐Catalyzed Alkene/Allene/Carbenoid Insertion Cascade
作者:Haixia Zhao、Yuchen Jiang、Tongqing Weng、Yongjia Shang、Jian Wang
DOI:10.1002/adsc.202201255
日期:2023.2.21
construction of conjugated 1,3-dienes bearing oxindoles or isoquinolinediones from alkenylated aryliodides, allenes and diazocompounds via a palladium catalyzed sequential alkene/allene/carbenoid insertion reaction was developed. Three C−C bonds were formed in high order, offering access to multi-substituted dienes in high yields and up to >20:1 E/Z selectivities. The reaction features excellent functional
A palladium-catalyzed tandem cyclization-cross-coupling reaction using indolylborate as a transfer agent
作者:Minoru Ishikura、Norinobu Takahashi、Koji Yamada、Reiko Yanada
DOI:10.1016/j.tet.2006.09.065
日期:2006.12
Investigation of the palladium-catalyzed tandem cyclization-cross-coupling reaction using indolylborate (2) as a transfer agent has been carried out. Furthermore, the cross-coupling reaction performed under carbon monoxide led to the generation of indolyl ketones. (c) 2006 Elsevier Ltd. All rights reserved.