CS274092B1 - Benzyl 3,4-di-0-benzyl-2-0(2,3,4,6-tetra-0-acetyl-beta-d-glucopyranozyl)-beta-d-xylopyranoside - Google Patents

Benzyl 3,4-di-0-benzyl-2-0(2,3,4,6-tetra-0-acetyl-beta-d-glucopyranozyl)-beta-d-xylopyranoside Download PDF

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CS274092B1
CS274092B1 CS492089A CS492089A CS274092B1 CS 274092 B1 CS274092 B1 CS 274092B1 CS 492089 A CS492089 A CS 492089A CS 492089 A CS492089 A CS 492089A CS 274092 B1 CS274092 B1 CS 274092B1
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benzyl
acetyl
beta
xylopyranoside
tetra
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CS492089A
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CS492089A1 (en
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Eva Rndr Csc Petrakova
Ivana Ing Krupova
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Petrakova Eva
Krupova Ivana
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Description

1 CS 274092 B1
Vynález ae týká benzyl 3,4-di-0-benzyl-2T0-(2,3,4,6-tetra-O-acetyl-/f-D-glukopyrano-zyl)-/? -D-xylopyranozldu.
Benzyl 2-0-(2,3,4-tri-O-acetyl-/-D-xylopyranozyl)-3,4-di-0-benzyl-/J-D-xylopyranozidpřipravili P, Kováč a E. Petrákové fP. Kováč, E, Petrákové: Chem, zveati 34, 537 (198O)J .Ooteraz benzyl 3,4-di-0-benzyl-2-0-(2,3,4,6-tetra-0-acetyl-/?-D-glukopyranozyl)-/2 -D-xy-lopyranozid nebol připravený· Móže sa použif ako medziprodukt pre přípravu aacharidov aich derivótov.
Podstatou vynálezu je benzyl 3,4-di-0-benzyl-2-0-(2,3»4,6-tetra-0-acetyl-/í-0-gluko-pyranozyl)-(í-D-xylopyranozid vzorce
R·^ znamená benzyl a R2 znamená acetyl. Výhodou benzyl 3,4-di-0-benzyl-2-0-(2,3,4,6-tetra-0-acetyl-Z?-D-glukopyranozyl)-X?- 0--xylopyranozidu Je, že sú chráněné uhlíky 2, 3, 4, 6 na glukopyranózovej jednotke acetylový-mi skupinami,1 uhlíky 1, 3, 4 na xylpyranózovsj jednotke benzylovými skupinami, pričom ichmožno selektivně odstránif bez nebezpečia porušenia glykozidickej vffzby ziskajúc tak 2-0-- 4-D-glukopyranozyl-D-xylopyranózu. Přiklad 1 K 2 g benzyl 3,4-dl-0-benzyl-/f-D-xylopyranozldu, 1,8 g kyanidu ortufnatáho v 20 mlacetonitrilu sa přidá 2,9 g 2,3,4-tri-O-acetyl-t/z-D-glukopyranozylbromldu a za stálého mieSania sa reakčná zmes udržuje pri teploto 40 °C počeš 1 hodiny* Potom sa reakčná zmes odfiltruje, dvakrát vytrepe s 50 ml 1 molárneho roztoku bromidu draselného,' 50 ml vody, vysuší při-dáním bezvodóho síranu sodného, odfiltruje a zahustí. Po chromatografickom čistění sa získá3,05 g (85 %) benzyl 3,*4-di-0-benzyl-2-0-(2,3,4,6-tetra-0-acetyl-/f-D-glukopyranozyl)- /í-D--xylopyranozidu, po kryštalizácíl z etsnolu s teplotou topenla 89,5 až 90,5 °C, Specifickouotáčavosfou [z]^5 - 39,9 0 (c 1, chloroform).
Elementárně analýza pře mol, hmotnost 750,77: vypočítaná: 63,99 hmot. % uhlika, 6,18 hmot. % vodika,1. zietené: 64,16 hmot. % uhlika, 6,28 hmot* % vodika.
Benzyl 3,4-di-0-benzyl-2-0-(2,3,4,6-tetra-0-acetyl-/J -D-glukopyranozyl J-z<f-D-xylopyra-nozld može nájsf Široké použitie ako medziprodukt pri priprave 2-0-/tf-D-glukopyranozyl-O--xylopyranózy, ktorá má použitie v enzýmovej chómii a na rozliSenla druhov mikroorganizmov.

Claims (2)

  1. < CS 274092 Bl
  2. 2 PREDMET VYNALEZU Benzyl 3,4-dl-0-banzyl-2-0~l2,3,4,6-tetra-0-acatyl-/<3-D- glukopyranozylD-xylo-pyronozld vzorca
    v ktoron R| znamená benzyl aRg znamená acetyl·
CS492089A 1989-08-22 1989-08-22 Benzyl 3,4-di-0-benzyl-2-0(2,3,4,6-tetra-0-acetyl-beta-d-glucopyranozyl)-beta-d-xylopyranoside CS274092B1 (en)

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CS492089A CS274092B1 (en) 1989-08-22 1989-08-22 Benzyl 3,4-di-0-benzyl-2-0(2,3,4,6-tetra-0-acetyl-beta-d-glucopyranozyl)-beta-d-xylopyranoside

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CS492089A CS274092B1 (en) 1989-08-22 1989-08-22 Benzyl 3,4-di-0-benzyl-2-0(2,3,4,6-tetra-0-acetyl-beta-d-glucopyranozyl)-beta-d-xylopyranoside

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