[EN] AUTOMATED SYNTHESIS OF SMALL MOLECULES USING CHIRAL, NON-RACEMIC BORONATES [FR] SYNTHÈSE AUTOMATISÉE DE PETITES MOLÉCULES À L'AIDE DE BORONATES NON RACÉMIQUES, CHIRAUX
α-Phosphonovinyl Arylsulfonates: An Attractive Partner for the Synthesis of α-Substituted Vinylphosphonates through Palladium-Catalyzed Suzuki Reactions
A new and attractive coupling partner for the synthesis of α‐substituted vinylphosphonates through Suzuki reactions has been developed. The developed O‐centered electrophiles couple with various organoboron reagents to give α‐substituted vinylphosphonates in moderate to excellent yields. This protocol features broad substrate scope, mild conditions, and high efficiency.
Activation of Aryl Carboxylic Acids by Diboron Reagents towards Nickel‐Catalyzed Direct Decarbonylative Borylation
作者:Xi Deng、Jiandong Guo、Xiaofeng Zhang、Xiaotai Wang、Weiping Su
DOI:10.1002/anie.202106356
日期:2021.11.8
A Ni-catalyzed direct decarbonylative borylation of aryl carboxylic acids with B2cat2 has been established. B2cat2 serves as a borylating agent, but also activates the carboxylic acid substrate towards decarbonylative coupling, playing a dual role in this reaction. A combination of experimental and computational studies reveals that the reaction proceeds through a hitherto unknown concerted decarbonylation
已经建立了镍催化的芳基羧酸与 B 2 cat 2 的直接脱羰硼酰化反应。B 2 cat 2作为硼酸化剂,但也活化羧酸底物以进行脱羰偶联,在该反应中发挥双重作用。实验和计算研究的结合表明,该反应通过迄今为止未知的协同脱羰和还原消除步骤进行。
Recyclable cellulose-palladium nanoparticles for clean cross-coupling chemistry
作者:Zhichao Lu、Jacek B. Jasinski、Sachin Handa、Gerald B. Hammond
DOI:10.1039/c8ob00527c
日期:——
Cheap, recyclable, and robust cellulose-palladium nanoparticles were developed and fully characterized by FTIR, TEM, XPS, TGA, and NMR.
Stereoselective synthesis of oxazolidinonyl-fused piperidines of interest as selective muscarinic (M<sub>1</sub>) receptor agonists: a novel M<sub>1</sub> allosteric modulator
作者:Kenneth J. Broadley、Maxime G. P. Buffat、Erica Burnell、Robin H. Davies、Xavier Moreau、Stephen Snee、Eric J. Thomas
DOI:10.1039/c5ob02588e
日期:——
yloxymethyl-4-cyclobutyl-5-isopropenyloxazolidinone with the 5-isopropenyl and 4-tert-butyldimethylsilyloxymethyl groups cis-disposed about the five-membered ring by chelationcontrolled addition and in situ cyclisation. This reaction was useful for a range of organometallic reagents. The hydroboration–oxidation of (4SR,5RS)-3-benzyl-4-(tert-butyldimethylsilyloxymethyl)-4-cyclobutyl-5-(1-methoxyprop-2-en-2-yl)-1
Chemoselective oxidation of aryl organoboron systems enabled by boronic acid-selective phase transfer
作者:John J. Molloy、Thomas A. Clohessy、Craig Irving、Niall A. Anderson、Guy C. Lloyd-Jones、Allan J. B. Watson
DOI:10.1039/c6sc04014d
日期:——
conventional protecting group strategies, enabling chemoselective oxidation of BMIDA species over normally more reactive BPin substrates. We also demonstrate the selective oxidation of diboronic acid systems with chemoselectivity predictable a priori. The utility of this method is exemplified through the development of a chemoselective oxidative nucleophilecoupling.