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Synthesis and antitumor activity of 7- and 9-(6'-deoxy-alpha-L-talofuranosyl) hypoxanthine and 9-(6'-deoxy-alpha-L-talofuranosyl)-6-thiopurine.

Abstract：

:Reaction of 6-deoxy-2,3,5-tris-O-(p-nitrobenzoyl)-L-talofuranosyl bromide (1) with the trimethylsilyl derivative of hypoxanthine, followed by removal of blocking groups, afforded 9- (6) and 7-(6'-deoxy-alpha-L-talofuranosyl)hypoxanthine (7). A study of the published optical rotations and circular dichroic (CD) spectra of pentofuranosylpurines and of (6'-deoxy-beta-D-allo- and -alpha-L-talofuranosyl)purines prepared here suggests that the sign of rotation and the sign of the longer wavelength Cotton effect is determined solely by the configuration of C-1' and its position of attachment to the purine ring. For C-1' R nucleosides, the sign is negative for N-9-linked purine nucleosides and positive for the N-7-linked isomers, and vice versa for C-1'S purine nucleosides. Reaction of 1 with the trimethylsilyl derivative of 6-chloropurine afforded 4, which upon treatment with thiourea and deblocking yielded 9-(6'-deoxy-alpha-L-talofuranosyl)-6-thiopurine (8). Unlike the previously prepared 7-(6'-deoxy-beta-D-allofuranosyl) hypoxanthine which strongly inhibited purine nucleoside phosphorylase, compounds 6-8 did not inhibit this enzyme. Compound 8 significantly inhibited the growth of L1210 tumor cells in vitro and in vivo.

journal_name

J Med Chem

journal_title

Journal of medicinal chemistry

authors

Nelson V,El Khadem HS

doi

10.1021/jm00364a032

subject

Has Abstract

pub_date

1983-10-01 00:00:00

pages

1527-30

issue

10

eissn

0022-2623

issn

1520-4804

journal_volume

26

pub_type

杂志文章

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