Cycloaddition reactions. A new type of cycloadduct from a substituted 2-vinylthiophen and dmad
作者:Belen Abarca、Rafael Ballesteros、Concepcion Soriano
DOI:10.1016/s0040-4020(01)90036-5
日期:1987.1
Cycloaddition reactions between 2-(1-cyanoallyl)thiophen and the dienophiles diethyl azodicarboxylate, N-phenylmaleimide , methyl propiolate, and dimethyl acetylenedicarboxylate are reported. Products include simple benzo[b] thiophen carboxylates (13,19) and reduced derivatives (8,9,10,12,18), as a mixture of diastereoisomers, except in the adduct with diethyl azodicarboxylate. With dimethyl acetylenedicarboxylate
报道了2-(1-氰基烯丙基)噻吩与偶氮二偶氮偶氮二羧酸二乙酯,N-苯基马来酰亚胺,丙酸甲酯和乙炔二甲酸二甲酯之间的环加成反应。产品包括作为非对映异构体混合物的简单的苯并[b]噻吩羧酸盐(13,19)和还原衍生物(8,9,10,12,18),但与偶氮二羧酸二乙酯的加合物除外。乙炔二羧酸二甲酯也发现了一种新型的三环化合物(20)。