Simmons–Smith Cyclopropanation of Alkenyl 1,2-Bis(boronates): Stereoselective Access to Functionalized Cyclopropyl Derivatives
作者:Maruti Mali、Gangavaram V. M. Sharma、Subhash Ghosh、Thierry Roisnel、Bertrand Carboni、Fabienne Berrée
DOI:10.1021/acs.joc.2c00152
日期:2022.6.17
A Simmons–Smith stereodefined procedure for the synthesis of cyclopropyl-1,2-bis(boronates) has been developed starting from the corresponding alkenes. The resulting compounds were then subjected to regioselective Suzuki–Miyaura couplings to produce diversely tri- or tetra-substituted arylcyclopropanes in good yields. Further functionalization with 2-lithiothiophene provided 1,2-bis(aryl)cyclopropanes
Regio- and stereocontrolled synthesis of borylated <i>E</i>-enynes, <i>Z</i>-enediynes and derivatives from alkenyl-1,2-bis-(boronates)
作者:Malavath Ratanlal、Jayaram Vankudoth、Gangavaram V. M. Sharma、Maruti A. Mali、Bertrand Carboni、Fabienne Berrée、Subhash Ghosh
DOI:10.1039/d3ob00543g
日期:——
An efficient stereo-controlled synthesis of enyne and enediyne derivatives, via sequential Suzuki–Miyaura coupling reactions from easily prepared 1-alkene-1,2-diboronic esters and alkynyl bromides, is reported. The resulting enyne boronic esters were subjected to Borono–Mannich and Suzuki coupling reactions independently to obtain α,β-unsaturated aminoester and tri-substituted olefin derivatives, respectively
copper-catalyzed method for the synthesis of tetrazolo[5,1-a]isoquinolines has been developed starting from alkenyl-1,2-bis(boronates). The domino reaction underwent a Suzuki-Miyaura cross-coupling reaction and an azidation followed by an in situ [3 + 2] cycloaddition. Regioselective synthesis has been demonstrated by inverting the Suzuki-Miyaura cross-coupling reaction and the azidation.
开发了一种以烯基-1,2-双(硼酸酯)为原料合成四唑并[5,1- a ]异喹啉的有效铜催化方法。多米诺骨牌反应经历了铃木-宫浦交叉偶联反应和叠氮化反应,然后进行原位[3 + 2]环加成反应。区域选择性合成已通过反转 Suzuki-Miyaura 交叉偶联反应和叠氮化反应得到证实。