Three-component condensation of cyclic 1,3-dicarbonyl compounds, N-phenacylpyridinium salts, and isatins or aromatic aldehydes as a method for the synthesis of novel condensed 2-aroyl-2,3-dihydrofurans
作者:Dmitry V. Osipov、Maxim R. Demidov、Vitaly A. Osyanin、Yury N. Klimochkin
DOI:10.1007/s10593-021-03020-3
日期:2021.10
Three-component condensation of in situ generated pyridinium aroylmethylides with isatins or aromatic aldehydes and cyclic 1,3-dicarbonyl compounds gave a series of condensed 2-aroyl-2,3-dihydrofurans. The reaction proceeds diastereoselectively and represents a cascade process involving the Knoevenagel condensation, the carbo-Michael reaction, and intramolecular nucleophilic substitution. The possibility
原位生成的吡啶鎓芳酰基甲基化物与靛红或芳香醛和环状 1,3-二羰基化合物的三组分缩合得到一系列缩合的 2-芳酰基-2,3-二氢呋喃。该反应非对映选择性地进行,代表了一个涉及 Knoevenagel 缩合、碳-迈克尔反应和分子内亲核取代的级联过程。显示了通过锌在乙酸中的作用将螺环呋喃基取代的羟吲哚还原重排成吡喃衍生物的可能性。