Perkin communications. 4,4′-Dimethoxytrityl and 4-monomethoxytrityl tetrafluoroborate: convenient reagents for the protection of primary alcohols including sugars

Abstract

In a non-donor solvent (e.g. acetonitrile) and in the presence of 2,6-di-t-butyl-4-methylpyridine, the readily prepared 4-methoxytrityl tetrafluoroborate (3) and 4,4′-dimethoxytrityl tetrafluoroborate (2) are highly effective reagents for the methoxytritylation and dimethoxytritylation, respectively, of primary alcohols including sugars.