Recherches dans la série des cyclitols XLV. Action des diazoalcanes sur la pentahydroxy-2,4,6/3,5-cyclohexanone et sur son dérivé penta-O-acétylé. I. Etude des spiro-époxydes

On treatment with diazomethane, 2,4,6/3,5-penta-acetoxy-cyclohexanone(penta-O-acetyl-myo-inosose-2 or -scyllo-inosose) gave only a spiroepoxide. In contrast, replacement of diazomethane by higher diazoalkanes furnished a mixture of alkylspiroepoxides and of ring expansion products (cycloheptanone derivatives). The configuration and the reactions of the spiro-epoxides have been studied.