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Preparation of methyl 4,6-O-benzylidene-2-chloro- and -2-bromo-α- and β-d-xylo-hexopyranosid-3-uloses and their α-d-ribo isomers, and formation of glycosid-3-ulose hydrates for the β-d-xylo isomers

✍ Scribed by Tohru Sakakibara; Toshio Nakagawa

Publisher: Elsevier Science
Year: 1989
Tongue: English
Weight: 772 KB
Volume: 191
Category: Article
ISSN: 0008-6215
DOI: 10.1016/0008-6215(89)85067-0

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✦ Synopsis

The title glycosid-Iuloses were prepared from 3-nitro-@-D-three-hex-2-enopyranoside derivatives. 'H-N.m.r. spectral studies revealed that the 2-bromo-and 2-chloro-P-D-xylo-hexopyranosid-3-uloses readily equilibrated with their hydrates, but the remaining glycosid-3-uloses, including the cy-D-xylo and (Y-and /3-D-ribo isomers, were not hydrated under similar conditions.

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