CS272899B1 - Benzyl 2,4-di-o-benzyl-3-o(2,3,4,6-tetra-o-acetyl-beta-d-glucopyranozyl)-beta-d-xylopyranozide - Google Patents

Benzyl 2,4-di-o-benzyl-3-o(2,3,4,6-tetra-o-acetyl-beta-d-glucopyranozyl)-beta-d-xylopyranozide Download PDF

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CS272899B1
CS272899B1 CS492189A CS492189A CS272899B1 CS 272899 B1 CS272899 B1 CS 272899B1 CS 492189 A CS492189 A CS 492189A CS 492189 A CS492189 A CS 492189A CS 272899 B1 CS272899 B1 CS 272899B1
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benzyl
acetyl
tetra
beta
glucopyranosyl
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CS492189A
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CS492189A1 (en
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Eva Rndr Csc Petrakova
Ivana Ing Krupova
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Petrakova Eva
Krupova Ivana
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Abstract

Synthesised disaccharide benzyl 2,4-di-0-benzyl-3-0-(2,3,4,6-tetra-0-acetyl-β-D-glucopyranosyl)-β-D-xylopyranoside of a formula where R1 represents benzyl and R2 acetyl, intended for preparation of 3-0-β-D-glucopyranosyl-D-xylopyranose as an intermediate product. The invention can be used in saccharide chemistry and organic chemistry.

Description

(57)syntetizovaný disacharid benzyl 2,4-diO-benzyl-3-O-(2,3,4,6-tetra-0-acetyl-(i- -D-glukopyranozyl)- β -D-xylopyranozid vzorca, v ktorom R1 znamená benzyl a Rj? znamená acetyl, je určený na přípravy 3-0-β -D-glukopyranozyl-D-xylopyranozy ako medziprodukt. Riešenie mé použitie v chémii saoharidov a organiokej chémii.(57) synthesized benzyl 2,4-diO-benzyl-3-O- (2,3,4,6-tetra-O-acetyl- (1-D-glucopyranosyl) -β-D-xylopyranoside disaccharide of formula, in wherein R 1 is benzyl and R 3 is acetyl, is intended for the preparation of 3-O-β-D-glucopyranosyl-D-xylopyranose as an intermediate solution of my use in saoharide chemistry and organi-chemistry.

(Π) 272 899 (13) Bj.(8) 272 899 (13) Bj.

(51) lni. CL5 (51). CL 5

C 07 H 15/00OJ C 07 H 15/00

CS 272899 ELCS 272899 EL

Vynález sa týká benzyl 2,4-di-0-benzyl-3-0-(2,3,4,6-tetra-0-acetyl-^ -D-glukopyranozyl )-^ -D-xylopyranozidu.The invention relates to benzyl 2,4-di-O-benzyl-3-O- (2,3,4,6-tetra-O-acetyl-4-D-glucopyranosyl) - 4-D-xylopyranoside.

Benzyl 2-0-(2,3,4-tri-0-acetyl-/? -D-xylopyranozyl)-3,4-di-0-benzyl-/í’ -D-xylopyranozid připravili P. Kováč a E. Petrákové /P. Kováč, E. Petrákové; Chem. zvěsti 34, 537 (1980)/. Doteraz benzyl 2,4-di-0-benzyl-3-0-(2,3,4,6-tetra-0-acetyl-/ -D-glukopyranozyl)-/3 -D-xylopyranozid nebol připravený. Može sa použit? ako medziprodukt pre přípravu sacharidov a ich sacharidov.Benzyl 2-O- (2,3,4-tri-O-acetyl- N -D-xylopyranosyl) -3,4-di-O-benzyl- N -D-xylopyranoside was prepared by P. Kovac and E. Petráková / P. Kovac, E. Petrackova; Chem. rumors 34, 537 (1980)]. To date, benzyl 2,4-di-O-benzyl-3-O- (2,3,4,6-tetra-O-acetyl-1-D-glucopyranosyl) - 3-D-xylopyranoside has not been prepared. Can be used? as an intermediate for the preparation of carbohydrates and their carbohydrates.

Podstatou vynálezu je benzyl 2,4-di-0-benzyl-3-0-(2,3,4,6-tetra-0-acetyl-/ď -D-glukopyranozyl)- β -D-xylopyranozid vzorcaThe present invention provides benzyl 2,4-di-O-benzyl-3-O- (2,3,4,6-tetra-O-acetyl- N -D-glucopyranosyl) -β-D-xylopyranoside of the formula

v ktorom znamená benzyl a H2 znamená acetyl.wherein H is benzyl and H 2 is acetyl.

Výhodou benzyl 2,4-di-0-benzyl-3-0-(2,3,4,6-tetra-0-acetyl-β -D-glukopyranozyl)-β -D-xylopyranozidu je, že sú chráněné uhlíky 2, 3, 4, 6 na glukopyranózovej jednotke acetylovými skupinami, uhlíky 1, 3, 4 na xylopyranózovej jednotke benzylovými skupinami, pričom ich možno selektívne odstrániť bez nebezpečia porušenia glykozidickej vazby získajúc tak 3-0-/? -D-glukopyranozyl-D-xylopyranózu.The advantage of benzyl 2,4-di-O-benzyl-3-O- (2,3,4,6-tetra-O-acetyl-β-D-glucopyranosyl) -β-D-xylopyranoside is that they are protected by carbons 2 3, 4, 6 on the glucopyranose unit by acetyl groups, carbons 1, 3, 4 on the xylopyranose unit by benzyl groups, which can be selectively removed without the risk of breaking the glycosidic bond, thus obtaining 3-0-? -D-glucopyranosyl-D-xylopyranose.

Příklad 1Example 1

K 1 g benzyl 2,4-di-O-benzyl-^ -D-xylopyranozidu, 0,9 g kyanidu ortuťnatého-v 10 ml acetonitrilu sa přidá 1,48 g 2,3,4,6-tetra-0-acetyl-oC-D-glukopyranozylbromidu a za stálého miešania sa reakčná zmes udržuje pri teplote 40 °C počas 2 hodin. Potom sa reakčná zmes odfiltruje, dvakrát'· premyje 40 ml chloroformu, dvakrát vytrepe s 50 ml 1 molárneho roztoku bromidu draselného, 50 ml vody, vysuší přidáním bezvodého síranu sodného, odfiltruje a zahustí. Po chromatografickom čistění sa získá 1,5 g (84,3 %) benzyl 2,4-di-0-benzyl-3-0-(2,3,4,6-tetra-0-acetyl-/? -D-glukopyranozyl)- 0-D-xylopyranozidu so Specifickou otáčavosťou /dj - 18 0 (c 1, chloroform),To 1 g of benzyl 2,4-di-O-benzyl-4-D-xylopyranoside, 0.9 g of mercuric cyanide - in 10 ml of acetonitrile is added 1.48 g of 2,3,4,6-tetra-O-acetyl -oC-D-glucopyranosyl bromide, and with stirring, the reaction mixture is maintained at 40 ° C for 2 hours. The reaction mixture is filtered, washed twice with 40 ml of chloroform, shaken twice with 50 ml of 1 molar potassium bromide solution, 50 ml of water, dried by adding anhydrous sodium sulfate, filtered and concentrated. After chromatographic purification, 1.5 g (84.3%) of benzyl 2,4-di-O-benzyl-3-O- (2,3,4,6-tetra-O-acetyl-R-D-) are obtained. glucopyranosyl) - O-D-xylopyranoside with specific rotation / dj - 18 0 (c 1, chloroform),

Elementárna analýza pre mol. hmotnosť 750,77:Elemental analysis for mol. weight 750,77:

vypočítané: 63,99 hmot, % uhlíka, 6,18 hmot. % vodíka, zistené: 64,20 hmot. % uhlíka, 6,21 hmot. % vodíka,calculated: 63.99 wt.% carbon, 6.18 wt. % hydrogen, found: 64.20 wt. % carbon, 6.21 wt. % hydrogen,

Benzyl Ž^-di-O-benzyl-B-O-ÍS^^jS-tetra-O-acetyl-/^ -D-glukopyranozyl)-^ -D-xylopyranozid može náj sť široké použitie ako medziprodukt pri přípravě 3-0- β -D-glukopyranozyl-D-xylopyranózy, ktorá má použitie v enzýmovej chémii a na rozlíšenie druhov mikroorganizmov.Benzyl (N-di-O-benzyl-BO-R) (S-tetra-O-acetyl-N-D-glucopyranosyl) -4-D-xylopyranoside can be widely used as an intermediate in the preparation of 3-O-β -D-glucopyranosyl-D-xylopyranose, which has use in enzyme chemistry and to distinguish species of microorganisms.

Claims (1)

PREDMET VYNÁLEZUOBJECT OF THE INVENTION Benzyl 2,4-di-O-benzyl-3-O-(2,3,4,6-tetra-O-acetyl- /3 -xylopyranozid vzoreaBenzyl 2,4-di-O-benzyl-3-O- (2,3,4,6-tetra-O-acetyl-3-xylopyranoside) -D-glukopyranozyl)- β -D- v ktorom-D-glucopyranosyl) - β -D- in which R1 znamená benzyl a R2 znamená acetyl.R 1 is benzyl and R 2 is acetyl.
CS492189A 1989-08-22 1989-08-22 Benzyl 2,4-di-o-benzyl-3-o(2,3,4,6-tetra-o-acetyl-beta-d-glucopyranozyl)-beta-d-xylopyranozide CS272899B1 (en)

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