Benzocondensed six-membered heterocyclic rings containing two heteroatoms have been synthesized by a generally applicable method starting from disubstituted benzene compounds and methyl 4-chlorobutynoate (1) or methyl 4-bromobutenoate (2). The reactions with 1 yield a mixture of endo and exo (E or Z) isomers. The 13C nmr spectroscopy was used to assign the structure of the synthesized compounds.
已经通过通常适用的方法从二取代的苯化合物和4-氯丁酸甲酯(1)或4-溴丁烯酸甲酯(2)开始合成了包含两个杂原子的苯并稠合的六元杂环。与1的反应产生内和外(E或Z)异构体的混合物。的13 C NMR光谱法用于分配合成的化合物的结构。