申请人:Takano, Seiichi
公开号:EP0362628A2
公开(公告)日:1990-04-11
A compound of the formula:
wherein R is an unsubstituted benzyl group, a p-nitrobenzyl group, a benzyl group in which the phenyl group is substituted by one or two substituents selected from the group consisting of C₁-C₄ alkyl groups and C₁-C₄ alkoxy groups, a phenyl group which is substituted by a C₁-C₄ alkylenedioxy group or by one or two substituents selected from the group consisting of C₁-C₄ alkyl groups and C₁-C₄ alkoxy groups, a C₁-C₄ trialkylsilyl group, a mono-substituted C₁-C₄ alkyldiarylsilyl group, a triarylmethyl group, a C₁-C₄ acyl group, a substituted or unsubstituted benzoyl group, a C₁-C₄ alkoxycarbonyl group, a substituted or unsubstituted aryloxycarbonyl group, a tetrahydropyranyl group, a benzyloxymethyl group, or a methoxymethyl group.
以下式子的化合物
其中 R 是未取代的苄基、对硝基苄基、苯基被选自 C₁-C₄ 烷基和 C₁-C₄ 烷氧基组成的组中的一个或两个取代基取代的苄基、被 C₁-C₄烷二氧基或被选自 C₁-C₄ 烷基和 C₁-C₄ 烷氧基组成的组中的一个或两个取代基取代的苯基、C₁-C₄ 三烷基硅烷基、单取代的 C₁-C₄ 烷基芳基硅烷基、三芳甲基、C₁-C₄酰基、取代或未取代的苯甲酰基、C₁-C₄ 烷氧基羰基、取代或未取代的芳氧基羰基、四氢吡喃基、苄氧基甲基或甲氧基甲基。