Allenes and acetylenes. 22. Mechanistic aspects of the allene-forming reductions (SN2' reaction) of chiral propargylic derivatives with hydride reagents
A Boron–Oxygen Transborylation Strategy for a Catalytic Midland Reduction
作者:Kieran Nicholson、Joanne Dunne、Peter DaBell、Alexander Beaton Garcia、Andrew D. Bage、Jamie H. Docherty、Thomas A. Hunt、Thomas Langer、Stephen P. Thomas
DOI:10.1021/acscatal.0c05168
日期:2021.2.19
The enantioselective hydroboration of ketones is a textbook reaction requiring stoichiometric amounts of an enantioenriched borane, with the Midland reduction being a seminal example. Here, a turnover strategy for asymmetric catalysis, boron–oxygen transborylation, has been developed and used to transform the stoichiometric boranereagents of the Midland reduction into catalysts. This turnover strategy
Chirality Transfer during the [2,3]-sila-Wittig Rearrangement and Cyclopropanation Reaction of Optically Active [(<i>s</i><i>ec</i>-Allyloxy)silyl]lithiums
Allenes and acetylenes. 22. Mechanistic aspects of the allene-forming reductions (SN2' reaction) of chiral propargylic derivatives with hydride reagents