Diels-alder heterodiene in the reaction between 4-arylidene-5-pyrazolones and 2,3-dimethylbutadiene: the effect of acid catalysis(1)
作者:M. Brugnolotti、A. Corsico Coda、C. Desimoni、G. Faita、A. Gamba Invernizzi、P.P. Righetti、G. Tacconi
DOI:10.1016/s0040-4020(01)86030-0
日期:1988.1
The thermal reaction between (E) or (Z)-pyrazolones (1) and 2,3-dimethylbutadiene (2) gave 1,2-dimethyl-5-arylcyclohexen-4-spiro-4' (1'-phenyl-3'-substituted-5'-pyrazolones) (3, 4), from a Diels-Alder reaction, and 4-aryl-2-isopropenyl-2-methyl-5-substituted-7-phenyldihydropyran [3,2-d] pyrazoles (5, 6), from a heterodiene reaction. The effect of the configuration of the starting pyrazolone, as well
(E)或(Z)-吡唑啉酮(1)与2,3-二甲基丁二烯(2)之间的热反应得到1,2-二甲基-5-芳基环己烯-4-螺-4'(1'-苯基-3' Diels-Alder反应中的(3-,-5)-吡唑并酮(3,4)和4-芳基-2-异丙烯基-2-甲基-5-取代的-7-苯基二氢吡喃[3,2-d]吡唑( 5、6),来自杂二烯反应。本文讨论了起始吡唑啉酮的构型以及取代基的构型对异构体分布的影响。