Croatica Chemica Acta, Vol. 36 No. 2, 1964.
Izvorni znanstveni članak
Glucuronic Esters. U. The Preparation of Anomeric Methyl 2,3,4-tri-O-acetyl-1-0-acyl-D-glucopyranuronates. Deacylation of D-Glucuronic Acid Derivatives in Alkaline Medium
N. Pravdić
; Tracer Laboratory, Institute »Ruder Boskovic«, Zagreb, Croatia, Yugoslavia
D. Keglević
; Tracer Laboratory, Institute »Ruder Boskovic«, Zagreb, Croatia, Yugoslavia
Sažetak
The a- and P-anomers of methyl 2,3,4-tri-O-acetyl-1-0-acyl-
D- glucopyranuronates were prepared by the silver salt method,
by fractional crystallization, and/or by P-+ a anomerization. It was
established that the acid-catalyzed anomerization is specific
for the anomeric centre. By applying Hudson's rules of isorotation,
the A and B values for some methyl 2,3,4-tri-O-acetyl-1-0-acyl-
n-glucopyranuronates were calculated.
Alkaline hydrolysis of acetylated D-glucopyranuronates
showed that the splitting of the ester bond at C-1 always occurs
before the complete deacetylation takes place,
Ključne riječi
Hrčak ID:
208311
URI
Datum izdavanja:
30.9.1964.
Posjeta: 411 *