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PAVLOV et al.
tion of phenols with tetra-O-acetyl- -D-galactopyra-
nosyl bromide, demonstrate wide prospects for using
this modification of the Koenigs Knorr procedure for
preparing glycosides of various phenols.
Aryl -D-glucopyranosides VIIa VIIh. A 5-mmol
portion of appropriate acetylated aryl -D-gluco-
pyranoside was suspended in 10 ml of absolute meth-
anol, and 1 ml of a 1 M NaOMe solution in absolute
methanol was added. The deacetylated product started
to crystallize within 10 15 min. The mixture was left
overnight in a refrigerator, and the crystals were fil-
tered off, washed with methanol (1 30 ml), and
vacuum-dried at 60 C.
EXPERIMENTAL
The 13C NMR spectra of acetylated aryl glycosides
were recorded on a Varian CFT-20 spectrometer with
50% solutions in CDCl3, and those of the unprotected
compounds, with solutions in (CD3)2SO. The internal
reference was TMS. The electronic absorption spectra
of aryl- -D-glycopyranosides were recorded on an
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4
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RUSSIAN JOURNAL OF GENERAL CHEMISTRY Vol. 71 No. 11 2001