Asymmetric Imine Hydroboration Catalyzed by Chiral Diazaphospholenes
作者:Matt R. Adams、Chieh-Hung Tien、Robert McDonald、Alexander W. H. Speed
DOI:10.1002/anie.201709926
日期:2017.12.22
first use of diazaphospholenes as chiral catalysts has been demonstrated with enantioselective iminehydroboration. A chiral diazaphospholene prepared in a simple three‐step synthesis from commercial materials has been shown to achieve the highest enantioselectivity for the hydroboration of alkyl imines with pinacolborane reported to date. Enantiomer ratios of up to 88:12 were obtained with low (2 mol %)
METHOD FOR PRODUCING NOVEL ORGANOMETALLIC COMPLEX AND AMINE COMPOUND
申请人:KANTO KAGAKU KABUSHIKI KAISHA
公开号:US20160060282A1
公开(公告)日:2016-03-03
The purpose of the invention is to provide a novel organometallic compound that can be utilized as a catalyst having high generality, high activity, and excellent functional group selectivity. The invention pertains to a novel organometallic compound represented by general formula (1) that catalyzes a reductive amination reaction.
Hydroboration Catalyzed by 1,2,4,3-Triazaphospholenes
作者:Chieh-Hung Tien、Matt R. Adams、Michael J. Ferguson、Erin R. Johnson、Alexander W. H. Speed
DOI:10.1021/acs.orglett.7b02695
日期:2017.10.20
shown to catalyze the 1,2 hydroboration of 19 imines, and three α,β unsaturated aldehydes with pinacolborane, including examples that did not undergo hydroboration by previously reported diazaphospholene systems. DFT calculations support a mechanism where a triazaphospholene cation interacts with the substrate, a mechanism distinct from diazaphospholene catalyzed hydroborations.
High-Throughput Screening of Reductive Amination Reactions Using Desorption Electrospray Ionization Mass Spectrometry
作者:David L. Logsdon、Yangjie Li、Tiago Jose Paschoal Sobreira、Christina R. Ferreira、David H. Thompson、R. Graham Cooks
DOI:10.1021/acs.oprd.0c00230
日期:2020.9.18
screening system that is capable of screening thousands of organicreactions in a single day. This system combines a liquid handling robot with desorption electrospray ionization (DESI) mass spectrometry (MS) for a rapid reaction mixture preparation, accelerated synthesis, and automated MS analysis. A total of 3840 unique reductive amination reactions were screened to demonstrate the throughputs that are
Rhodium-catalyzed intermolecular C–H amination of simple hydrocarbons using the shelf-stable nonafluorobutanesulfonyl azide
作者:José Ramón Suárez、Jose Luis Chiara
DOI:10.1039/c3cc44594a
日期:——
A new procedure has been developed for the direct intermolecular CâH amination of simple hydrocarbons using shelf-stable nonafluorobutanesulfonyl azide in the presence of a dirhodium(II) tetracarboxylate catalyst under mild reaction conditions. Some mechanistic details are briefly discussed on the basis of control experiments.