An Interrupted Pummerer/Nickel-Catalysed Cross-Coupling Sequence
作者:Miles H. Aukland、Fabien J. T. Talbot、José A. Fernández-Salas、Matthew Ball、Alexander P. Pulis、David J. Procter
DOI:10.1002/anie.201805396
日期:2018.7.26
An interrupted Pummerer/nickel‐catalysedcross‐coupling strategy has been developed and used in the elaboration of styrenes. The operationally simple method can be carried out as a one‐pot process, involves the direct formation of stable alkenyl sulfonium salt intermediates, utilises a commercially available sulfoxide, catalyst, and ligand, operates at ambient temperature, accommodates sp‐, sp2‐, and
申请人:The Board of Trustees of the University of Illinois
公开号:US20180305381A1
公开(公告)日:2018-10-25
The present disclosure provides tri-orthoalkylphenyl phosphine catalysts that are tuned electrically and sterically. Method of using the catalyst for cross-coupling of unactivated secondary boronic acids with near-perfect levels of site- and stereoretention are also provided.
A process for producing cyanonorbornene of the present invention includes Step 1 of preparing a mixture solution including 0.5% by weight to 28% by weight of methyl bicyclononadiene, with respect to a total amount of 100% by weight of dicyclopentadiene, acrylonitrile, and the methyl bicyclononadiene, in a container, and Step 2 of reacting the bicyclopentadiene with the acrylonitrile in the presence of the methyl bicyclononadiene, in the mixture solution.
A molecular mechanics approach to mapping the conformational space of diaryl and triarylphosphines
作者:Natalie Fey、James A. S. Howell、Jonathan D. Lovatt、Paul C. Yates、Desmond Cunningham、Patrick McArdle、Hugo E. Gottlieb、Simon J. Coles
DOI:10.1039/b610123b
日期:——
A molecular mechanics force field has been developed which accurately reproduces experimental solid state structures and conformer interconversion barriers for a series of sterically congested diaryl and triaryl phosphines and some of their chalcogenide and Cr(CO)5 derivatives.
chiral piperidine subunits, and catalytic enantioselective formal synthesis of CP-293,019, a selective D4 receptor antagonist, was achieved. Preliminary mechanistic studies indicated that both sulfoxides and phosphine sulfides can activate TMSCN as a Lewis base. In addition, the sulfoxides with appropriate stereochemistry might stabilize a highly enantioselective bimetallic complex (a presumed active catalyst)