Preparation of 1-(5-substituted-2-furyl)-2-phenylsulfonyl-2-furoyl ethylenes (IIa-IId) using the Lehnert modification of Knoevenagel condensation, as well as substitution nucleophilic reactions of the 1-(5-bromo-2-furoyl)-2-phenylsulfonyl-2-furoyl derivative (IIa) with the corresponding phenolate, thiophenolate and secondary amines are described. IR, UV and 1H NMR spectra of final products are presented.
使用Knoevenagel缩合的Lehnert改进方法,制备1-(5-取代-2-呋喃基)-2-苯基磺酰基-2-呋喃基乙烯(IIa-IId),并描述了1-(5-溴-2-呋喃基)-2-苯基磺酰基-2-呋喃基衍生物(IIa)与相应酚酚盐、硫酚盐和二级胺的取代亲核反应。给出了最终产物的IR、UV和1H NMR光谱。