Organozirconocenes in organic synthesis: tandem epoxide rearrangement-carbonyl addition
作者:Peter Wipf、Wenjing Xu
DOI:10.1021/jo00056a011
日期:1993.2
Addition of catalytic amounts of AgClO4 to a mixture of organozirconocenes and epoxides results in the rapid formation of chain-extended secondary alcohols.
Enantioselective Conjunctive Cross-Coupling of Bis(alkenyl)borates: A General Synthesis of Chiral Allylboron Reagents
作者:Emma K. Edelstein、Sheila Namirembe、James P. Morken
DOI:10.1021/jacs.7b01774
日期:2017.4.12
conjunctive cross-coupling is used for the synthesis of enantioenriched allylboron reagents. This reaction employs nonsymmetric bis(alkenyl)borates as substrates and appears to occur by a mechanism that involves selective activation of the less substituted alkene followed by migration of the more substituted alkene during the course of a Pd-induced metalate rearrangement.
Palladium-Catalyzed Enantioselective Intermolecular Coupling of Phenols and Allylic Alcohols
作者:Nicholas J. Race、Cristiane S. Schwalm、Takayuki Nakamuro、Matthew S. Sigman
DOI:10.1021/jacs.6b11486
日期:2016.12.14
An enantioselective intermolecular coupling of oxygen nucleophiles and allylic alcohols to give β-aryloxycarbonyl compounds is disclosed using a chiral pyridine oxazoline-ligated palladium catalyst under mild conditions. As opposed to the formation of traditional Wacker-type products, enantioselective migratory insertion is followed by β-hydride elimination toward the adjacent alcohol. Deuterium labeling