对12种2-芳基硫杂脯氨酸进行了红外光谱和核磁共振谱测定,对其中两个化合物作了质谱测定。结果表明,这类化合物固态时主要以两性离子形式存在;有较强的分子离子峰,是一类较稳定的化合物。它们还存在一对非对映异构体,芳环上的取代基对芳环电子云密度的影响较大,而对四氢噻唑环的影响较小。 Twelve kinds of 2-aryl thioproline were measured by infrared spectroscopy and nuclear magnetic resonance spectroscopy, two of which were made by mass spectrometry. The results show that these compounds are mainly in the form of zwitterions in the solid state, and have strong molecular ion peaks and are relatively stable compounds. They also exist a pair of diastereoisomers, aromatic ring substituents on the aromatic ring electron cloud density greater impact on the tetrahydrothiazole ring less.