Thermodynamic and kinetic considerations in the chemoselective O-acylation by mixed anhydrides. A semiempirical MO approach
作者:Antonio J. Mota、Rafael Robles、Luis Álvarez de Cienfuegos、Alberto Lamenca
DOI:10.1016/j.tetlet.2004.03.045
日期:2004.4
A simple methodology to achieve high chemoselective O-acylation of primary hydroxy groups, in the presence of secondary ones, was performed by means of the quick generation of a mixed anhydride using mild and inexpensive conditions. Steric and electronic factors are involved in this preference. As far as the geometries are concerned, semiempirical calculations were carried out in order to determine