Hydroboration of aldehydes, ketones and CO<sub>2</sub> under mild conditions mediated by iron(<scp>iii</scp>) salen complexes
作者:Samantha Lau、Cei B. Provis-Evans、Alexander P. James、Ruth L. Webster
DOI:10.1039/d1dt02092g
日期:——
The hydroboration of aldehydes, ketones and CO2 is demonstrated using a cheap and air stable [Fe(salen)]2-μ-oxo pre-catalyst with pinacolborane (HBpin) as the reductant under mild conditions. This catalyst system chemoselectively hydroborates aldehydes over ketones and ketones over alkenes. In addition, the [Fe(salen)2]-μ-oxo pre-catalyst shows good efficacy at reducing “wet” CO2 with HBpin at room
[EN] FUSED TRI AND TETRA-CYCLIC PYRAZOLE KINASE INHIBITORS<br/>[FR] INHIBITEURS DE PYRAZOLE KINASE FUSIONNEE TRICYCLIQUE ET TETRACYCLIQUE
申请人:ABBOTT LAB
公开号:WO2004080973A1
公开(公告)日:2004-09-23
Compounds having the formula (I) (I), are useful for inhibiting protein kinases. Also disclosed are methods of making the compounds, compositions containing the compounds, and methods of treatment using the compounds.
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
Ruthenium-Catalyzed α-(Hetero)Arylation of Saturated Cyclic Amines: Reaction Scope and Mechanism
作者:Aldo Peschiulli、Veerle Smout、Thomas E. Storr、Emily A. Mitchell、Zdeněk Eliáš、Wouter Herrebout、Didier Berthelot、Lieven Meerpoel、Bert U. W. Maes
DOI:10.1002/chem.201204438
日期:2013.7.29
3‐ethyl‐3‐pentanol. A systematic study on the substrate and reagent scope of this transformation is disclosed in this paper. The effect of substitution on both the piperidine ring and the arylboronic ester has been investigated. Smaller (pyrrolidine) and larger (azepane) saturated ring systems, as well as benzoannulated derivatives, were found to be compatible substrates with the α‐arylation protocol. The successful