Adamantylation and Adamantylalkylation of Amides, Nitriles and Ureas in Trifluoroacetic Acid
作者:Elvira Shokova
DOI:10.1055/s-1997-1304
日期:1997.9
A new preparative method for N-adamantylation of carboxylic acid amides, ureas and for C5-adamantylation of barbituric acid in trifluoroacetic acid (TFA) is proposed. Tertiary 1-adamantanols and 1-(1-adamantyl)alkanols were used as adamantylating agents. The reaction of 1-(1-adamantyl)alkanols with nitriles in TFA solution was employed for the first time for the preparation of N-[1-(1-adamantyl)alkyl]amides.
synthesized by electrophilicsubstitutionreactions of hydroxy- and bromoadamantanes with salicylic acid, as well as by reactions of 5-(3-hydroxyadamantan-1-yl)salicylic acid with carbon and nitrogen nucleophiles, in trifluoroacetic acid. The possibility of selective hydroxylation of the adamantane fragment in 5-(adamantan-1-yl)salicylic acid with sulfuric acid in trifluoroaceticanhydride has been demonstrated