Oxidative isomerization of vinylidenecyclopropanes 1 produces dimethylenecyclopropane aldehydes 2 in moderate to good yields using tetrapropylammonium perruthenate (TPAP)/4-methylmorpholine N-oxide (NMO) as a catalytic system and the obtained dimethylenecyclopropanes 3 can be transformed to indene derivatives smoothly in the presence of Bronsted acid (HOTf). The scope and limitations as well as the
使用四丙基过
钌酸
铵 (
TPAP)/4-甲基吗啉 N-氧化物 (NMO) 作为催化体系,亚
乙烯基环丙烷 1 的氧化异构化产生中等至良好产率的二
亚甲基环丙烷醛 2,并且所获得的二
亚甲基环丙烷 3 可以在存在下顺利转化为
茚衍
生物布朗斯台德酸 (HOTf)。已经讨论了范围和限制以及可能的机制。