Stereoselective aldol condensations via boron enolates
作者:D. A. Evans、J. V. Nelson、E. Vogel、T. R. Taber
DOI:10.1021/ja00401a031
日期:1981.6
carboxylic acid derivatives with dialkylboryl triflates in the presence of a tertiary amine and the subsequent aldol condensations of these boron enolates was conducted. The stereochemistry of the enolates formed from acyclic ketones was found to be dependent on the structure of the ketone, the dialkylboryl triflate, and the tertiary amine. A mechanism for the enolization involving initial coordination of
Mannich reaction of carbonyl compounds via boron enolates and N,N,N′,N′-tetramethyldiaminomethane
作者:Ernest G. Nolen、Andrea Allocco、Jim Vitarius、Karen McSorley
DOI:10.1039/c39900001532
日期:——
A variety of carbonylcompounds undergo N,N-dimethylaminomethylation in moderate to good yields by the Mannichreaction involving boronenolates and N,N,N′,N′-tetramethyldiaminomethane in dichloromethane.