SYNTHESIS OF 3-DEOXY-D-MANNO-2-OCTULOSONIC ACID (KDO)

被引:0
|
作者
FRICK, W [1 ]
KRULLE, T [1 ]
SCHMIDT, RR [1 ]
机构
[1] UNIV CONSTANCE,FAK CHEM,POSTFACH 5560,W-7750 CONSTANCE,GERMANY
来源
关键词
PHOSPHONIUM BROMIDE; (BENZYLOXY)(BENZYLOXYCARBONYL)METHYL]TRIPHENYL; WITTIG REACTION; D-MANNOSE ALDEHYDE; SYNTHESIS OF PER-0-PROTECTED; KDO, SYNTHESIS OF 4,5-7,8-DI-0-ISOPROPYLIDENE-PROTECTED;
D O I
暂无
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
[(Benzyloxy)(benzyloxycarbonyl)methyl]triphenylphosphonium bromide (8), obtained from glyoxylic acid via a convenient one-pot procedure, reacted in a Wittig reaction with 4-O-benzyl-2,3:5,6-di-O-isopropylidene-D-mannose (7), readily synthesized on a large scale from D-mannose, to provide the KDO derivative 9. Hydrogenolytic removal of the benzyl groups furnished directly the 4,5:7,8-di-O-isopropylidene protected KDO 11. Its treatment with diazomethane led to the known ester derivative 12-alpha, beta (2:1 anomeric mixture) which could be also obtained by transesterification of 9 and subsequent hydrogenolytic debenzylation.
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页码:435 / 438
页数:4
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