A COMPARATIVE STUDY OF SUPPORTS FOR THE SYNTHESIS OF OLIGONUCLEOTIDES WITHOUT USING AMMONIA

Abstract
A comparative study of the cleavage efficiency of succinyl, phthaloyl, oxalyl, 2-(2-nitrophenyl)ethyl, 9-fluorenylmethyl, and 2-nitrobenzyl supports in 0.5M DBU solutions is described. A decrease in cleavage efficiency is observed when small oligonucleotides containing thymidine are linked to the supports. In these conditions oxalyl supports gave the best yields followed by 2-(2-nitrophenyl)ethyl and 9-fluorenylmethyl supports.