by selenazole. The physiochemical properties and infrared spectra of the sulfur- and selenium-containing analogs were very similar. Differentiation was mostapparent in the nuclear magnetic resonance spectra where the α- and β-protons of the selenienyl compounds were shifted downfield relative to those of the corresponding thienyl compounds. With deuterated thiofluoroacetic acid as the solvent, a more
通过苯环被
噻吩基和
硒烯基部分取代以及
噻唑基团被亚
硒唑取代,制备了一系列三个新的
左旋咪唑等排体。含
硫和
硒类似物的理化性质和红外光谱非常相似。区别在核磁共振谱中最为明显,在该光谱中,
硒烯基化合物的α和质子相对于相应的
噻吩基化合物的质子向场下移。用
氘代
硫代
氟乙酸作为溶剂,与化合物16相比,观察到化合物17和18的
硒烯基环的α-质子交换更快。