R. Paredes et al., FACILE NEW METHODS FOR INTRODUCTION AND REMOVAL OF THE DIPHENYLMETHYLGROUP AS A PROTECTIVE GROUP OF CARBOXYLIC-ACIDS, Tetrahedron letters, 37(12), 1996, pp. 1965-1966
Easy new methods for introducing and removing the diphenylmethyl group
as a protective group of carboxylic acids are presented. For the form
ation of the diphenylmethyl esters from the carboxylic acids and benzh
ydrol, the unusual A(AL)2 mechanism is followed.