substituted methylenecycloalkanes. Methyl groups in the 2-position are transformed into angular methyl groups in decalin or indane derivatives. The chloromethylaluminum alkoxides produced in these reactions, i.e. 3 and 7, undergo an Oppenauer oxidation in situ in the presence of excess acrolein to give the corresponding ketone in good yield. Using these procedures, indenone 8a has been prepared from
已经表明,顺序的烯反应脱嵌序列适用于2-和3-取代的亚甲基环
烷烃。在2-
萘烷或
茚满衍
生物中2-位的甲基被转化为角甲基。在这些反应中生成的
氯甲基铝醇盐(即3和7)在过量
丙烯醛存在下原位进行Oppenauer氧化,以高收率得到相应的酮。使用这些程序,在一锅中由4a制备了
茚满酮8a,收率为60%。