Process for preparing 2',3',5'-tri-0-acetyl-6-azauridine
    93.
    发明授权
    Process for preparing 2',3',5'-tri-0-acetyl-6-azauridine 失效
    制备2 {40,3 {40,5 {40-三-O-乙酰基-6-氮杂环丁烷]的方法

    公开(公告)号:US3954752A

    公开(公告)日:1976-05-04

    申请号:US476459

    申请日:1974-06-05

    IPC分类号: C07H19/12 C07D253/06

    CPC分类号: C07H19/12

    摘要: Process for preparing 2',3',5'-tri-0-acetyl-6-azauridine having the following formula ##SPC1##Which comprises reacting a crude anomeric mixture of methyl D-ribofuranosides having the formula ##SPC2##With anhydrous hydrogen chloride or anhydrous hydrogen bromide in the presence of acetic anhydride and acetic acid to thereby form the corresponding 2,3,5-tri-0-acetyl-D-ribofuranosyl halide having the formula ##SPC3##Wherein X is chloro or bromo, reacting the halide of formula III with 3,5-bis-trimethylsilyloxy-1,2,4-triazine having the following formula ##SPC4##In the presence of an inert solvent and a mercuric halide and recovering the 2',3',5'-tri-0-acetyl-6-azauridine.

    摘要翻译: 制备具有下列结构式的2',3',5'-三-O-乙酰基-6-氮杂环丁烷的方法,其中包括反应具有下式的甲基D-呋喃核糖苷的原始反应混合物,其具有无机氢氯化物或无机氢溴化物 乙酸酐和乙酸的存在形成具有式WHEREIN X为氯或溴的相应的2,3,5-三-O-乙酰基-D-呋喃核糖基卤,使式III的卤化物与3,5-双 具有下式的三甲基甲硅烷氧基-1,2,4-三嗪在惰性溶剂和富马酸盐的存在下并恢复2',3',5'-三-O-乙酰基-6-氮杂环丁烷。

    Method for the preparation of o-substi-tuted-6-azacytinines and 6-azacytidine
    94.
    发明授权
    Method for the preparation of o-substi-tuted-6-azacytinines and 6-azacytidine 失效
    制备O-取代的6-氮杂胞苷和6-氮杂环丁烷的方法

    公开(公告)号:US3776899A

    公开(公告)日:1973-12-04

    申请号:US3776899D

    申请日:1970-07-24

    IPC分类号: C07H19/12 C07D51/52

    CPC分类号: C07H19/12

    摘要: A METHOD IN WHICH SOLUTIONS OF 2H, 3''-O-ALKYLIDENE-5''O-ACYL-4-THIO-6-AZAURIDINES OR 2'',3''-O-ALKYLIDENE-4-THIO6-AZAURIDINES IN ORGANIC SOLVENTS ARE TREATED WITH AMMONIA AT ATMOSPHERIC PRESSURE TO CONVER THE SUBSTITUTED AZAURIDINES TO 2'',3''-O-ALKYLIDENE-5-O-ACYL-6-AZACYTIDINES OR 2'',3''-O-ALKYLIDENE-6-AZACYTIDINES WHICH MAY THEN BE CONVERTED, IF DESIRED, TO FREE 6-AZACYTIDINE BY DISSOLVING THE ABOVE SUBSTITUTED-6-AZACYTIDINE IN AN ANHYDROUS SOLVENT AND TREATING SAME WITH A METAL ALCOHOLATE AT AN ALKALINE PH.