Using the Curtius reaction, the acids VIa and VIv were transformed to the carbamates IVa and IVb which afforded by alkaline hydrolysis the primary amines Ia and Ib. The N-methyl derivatives IIab were obtained by reduction of the carbamates IVa with lithium aluminium hydride. The N,N-dimethyl derivatives IIIab resulted by methylation of the primary amines Iab with formaldehyde and formic acid. The synthesis of the acid VIb was carried out from phthalide and 2-methoxythiophenol in seven steps. The amines Iab-IIIab showed clear thymoleptic properties in the test of reserpine ptosis in mice and by inhibition of the perphenazine catalepsy in rats. The acid VIb has antiinflammatory activity.
使用Curtius反应,酸VIa和VIv转化为
尿素酯IVa和IVb,通过碱性
水解得到主要胺Ia和Ib。N-甲基衍
生物IIab通过还原
尿素酯IVa得到。N,N-二甲基衍
生物IIIab通过用
甲醛和
甲酸对主要胺Iab进行甲基化得到。酸VIb的合成是从
邻苯二甲酸酐和
2-甲氧基噻吩在七个步骤中完成的。胺Iab-IIIab在小鼠对
利血平致眼睑下垂试验中表现出明显的抗抑郁特性,并通过抑制对
氯丙嗪对大鼠的猫状痉挛来展现。酸VIb具有抗炎活性。