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Methyl tri-0-acetyl-a-D-glucopyranosyluronate 1-bromide ( I ) wm coupled with 6-acetamido-9-chloromercuripurine to give &acetamido-9-(methyl tri-O-acetyl-,9-D-glucopyrrtnosyluronate)purine (11) which on Ndeacetylation with picric acid gave 9-( methyl tri-O-acetyl-,9-D-glucopyranosyluronate)adenine (IV) and on complete deacetylation with methanolic ammonia gave 9-(/3-D-glucuronosylamide)adenine (V). The coupling of tetra-0-acetyl-p-D-galacto-and -p-D-glucofuranosyl chlorides (VI and VIa) with 6-chloro-9-chloromercuripurine, followed by treatment with thiourea and deacetylation with sodium methoxide, has given the two crystalline 9-glycofuranosyl-6-mercaptopourines (VI11 and VIIIa). ( 5 ) A. Roedig, "Methoden der Organische Chemie," 5/4, Georg Thieme Verlag, Stuttgart, 1960, p. 580. m, 2249 (1963).