ENANTIOMERICALLY PURE 7-OXABICYCLO(2.2.1)HEPT-5-EN-2-YL DERIVATIVES (NAKED SUGARS) AS SYNTHETIC INTERMEDIATES .25. TOTAL ASYMMETRIC-SYNTHESIS OF 3-AMINO-3-DEOXY-L-TALOSE AND DERIVATIVES

被引:4
|
作者
HUNENBERGER, P [1 ]
ALLEMANN, S [1 ]
VOGEL, P [1 ]
机构
[1] UNIV LAUSANNE,CHIM SECT,CH-1005 LAUSANNE,SWITZERLAND
关键词
D O I
10.1016/0008-6215(94)80034-0
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
(1R,2R,4R)-2-exo-Cyano-7-oxabicyclo[2.2.1]hept-5-en-2-yl (1S')-camphanate [(+)-1, Diels-Alder adduct of furan to 1-cyanovinyl (1S)-camphanate] was transformed with high stereoselectivity into (1R,2R,6R,7R)-4-phenyl-3,10-dioxa-5-azatricyclo[5.2.1.0(2,6)]dec-4-en-9-one [(+)-10]. Bromination of the corresponding (tert-butyl)dimethylsilyl enol ether [(-)-11], followed by Baeyer-Villiger oxidation and then alkaline methanolysis provided methyl 3-amino-1,5-anhydro-2-O,3-N-benzoyl-3-deoxy-alpha-L-talofuranuronate [(-)-17], the reduction of which gave 3-amino-1,5-anhydro-2-O,3-N-benzoyl-3-deoxy-alpha-L-talofuranose [(-)-19]. Treatment with aqueous HCl furnished 3-amino-3-deoxy-L-talose hydrochloride [(-)-2].
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页码:175 / 187
页数:13
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