then with water and triethylamine gave () in 67% yield; the latter compound was treated with m-chloroperbenzoic acid and the putative ring-contracted aldehyde () obtained was converted into the showdomycin analogue () in satisfactory overall yield. 3,4,6-Tri-O-benzyl--galactal () was similarly converted into the corresponding α--lyxoside ().
首先用苯
硒烯基
氯,然后用
水和
三乙胺处理3,4,6-三-O-苄基-
葡萄糖醛(),收率(%)为()。后者化合物的溶液用米
氯过
苯甲酸和推定的环收
缩醛()中获得转化成showdomycin类似物(在令人满意的总收率)。3,4,6-三- Ö苄基-galactal( )进行类似转化成相应的α- -lyxoside( )。