Sythesis of 2,2'-Diacyl-1,1'-biaryls. Regiocontrolled Protection of Ketones in Unsymmetrically Substituted 9,10-Phenanthrenequinones

Article abstract of DOI:10.1021/jo01311a034

A regiocontrolled monoketalization of unsymmetrically substituted phenanthrenequinones by use of 2,2-dimethyl-1,3-propanediol as the ketalizing reagent has been effected with the help of bromo substitution in one of the aromatic rings at the C-1 or C-8 po