Catalytic regeneration of a Th–H bond from a Th–O bond through a mild and chemoselective carbonyl hydroboration
作者:Tapas Ghatak、Konstantin Makarov、Natalia Fridman、Moris S. Eisen
DOI:10.1039/c8cc05030a
日期:——
Here we present an unprecedented chemoselectivehydroboration for aldehydes and ketones catalysed by actinides. The reaction features a very low catalyst loading (0.1–0.004 mol%) and quantitative product formation in less than 15 minutes, at room temperature. Thermodynamic and kinetic studies including stoichiometric and labeling studies with deuterated pinacolborane allow us to propose a plausible
A Versatile NHC-Parent Silyliumylidene Cation for Catalytic Chemo- and Regioselective Hydroboration
作者:Bi-Xiang Leong、Jiawen Lee、Yan Li、Ming-Chung Yang、Chi-Kit Siu、Ming-Der Su、Cheuk-Wai So
DOI:10.1021/jacs.9b06714
日期:2019.11.6
time: 0.17 h, yield: 98 %, TOF = 58.7 h-1) for the selective reduction of CO2 with pinacolborane HBpin to form the primarily reduced formoxyborane [pinBOC(=O)H]. The activity is better than the cur-rently available base-metal catalysts used for such reaction. It also catalysed the chemo- and regioselectivehydroboration of carbonyl compounds and pyridine derivatives to form borate esters and N-boryl-1
A <i>N</i>-Phosphinoamidinato NHC-Diborene Catalyst for Hydroboration
作者:Jun Fan、Jian-Qiang Mah、Ming-Chung Yang、Ming-Der Su、Cheuk-Wai So
DOI:10.1021/jacs.0c12627
日期:2021.4.7
The use of the N-phosphinoamidinato NHC-diborene catalyst 2 for hydroboration is described. The N-phosphinoamidine tBu2PN(H)C(Ph)═N(2,6-iPr2C6H3) was reacted with nBuLi in Et2O to afford the lithium derivative, which was then treated with B2Br4(SMe2)2 in toluene to form the N-phosphinoamidinate-bridged diborane 1. It was reacted with the N-heterocyclic carbene IMe (:CN(CH3)C(CH3)}2) and excess potassium
Magnesium-catalysed hydroboration of aldehydes and ketones
作者:Merle Arrowsmith、Terrance J. Hadlington、Michael S. Hill、Gabriele Kociok-Köhn
DOI:10.1039/c2cc30565h
日期:——
The heteroleptic magnesium alkyl complex [CHC(Me)NAr}2MgnBu] (Ar = 2,6-iPr2C6H3) is reported as a highly efficient pre-catalyst for the hydroboration of aldehydes and ketones with pinacolborane.
杂配位镁烷基复合物 [CHC(Me)NAr}2MgnBu] (Ar = 2,6-iPr2C6H3) 被报道为以针状硼烷对醛和酮进行氢硼化的高效前催化剂。
<i>n</i>-Butyllithium Catalyzed Selective Hydroboration of Aldehydes and Ketones
作者:Zhangye Zhu、Xueli Wu、Xiaojuan Xu、Zhenjie Wu、Mingqiang Xue、Yingming Yao、Qi Shen、Xiaoguang Bao
DOI:10.1021/acs.joc.8b01495
日期:2018.9.7
selective hydroboration of aldehydes and ketones with HBpin is achieved by using the simple and convenient n-BuLi as a catalyst. The reaction proceeds rapidly with low catalyst loading (0.1–0.5 mol %) under mild conditions. Key features include the high catalytic efficiency, exceptional functional group compatibility, ample substrate scope, and high selectivity for aldehydes over ketones. Computational studies