作者:N. M. Chernov、T. V. Moroz、R. V. Shutov、N. N. Kuz’mich、A. E. Shchegolev、M. V. Sopova、I. P. Yakovlev
DOI:10.1134/s1070363219120223
日期:2019.12
The effect of electronic properties of substituents in the reactants on the [4+2]-cycloaddition of 3-vinyl-chromen-4-ones (dienes) and N-vinylpyrrolidines (dienophiles) has been studied. The conditions determining the formation of 4,4a-dihydroxanthones or benzophenones as the major products have been found. The aromatization of 4,4a-dihydroxanthones via pyran ring opening has been interpreted by quantum
已经研究了反应物中取代基的电子性质对3-乙烯基色烯-4-酮(二烯)和N-乙烯基吡咯烷酮(二亲亲烯)的[4 + 2]-环加成的影响。已经发现确定形成4,4a-二氢黄嘌呤或二苯甲酮作为主要产物的条件。通过吡喃开环将4,4a-二氢氧杂蒽芳构化已通过量子化学计算进行了解释。已分离出一系列新的4,4a-二氢黄酮和二苯甲酮衍生物。