作者:P. Caramella、A. Coda Corsico、A. Corsaro、D. Del Monte、F. Marinone Albini
DOI:10.1016/0040-4020(82)85063-1
日期:1982.1
Cycloadditions of benzonitrile oxide and mesitonitrile oxide to N-methylindole and indole yield the acid sensitive cycloadducts 1 a-d with high regioselectivity. With N-carbethoxyindole the stable cycloadducts 1 e,f and minor amounts of the regioisomeric 2 e,f are isolated. The electron withdrawing substituent reduces both the regioselectivity and the reactivity of the cycloadditions.
苯甲腈氧化物和均丁腈氧化物与N-甲基吲哚和吲哚的环加成反应会产生具有高区域选择性的酸敏感性环加合物1 ad。用N-乙氧基吲哚分离出稳定的环加合物1e,f和少量的区域异构体2e,f。吸电子取代基降低了环加成的区域选择性和反应性。