Thiazole 誘導体の研究 (II) : 2-Phenylthioureido-4-methylthiazole の無水酢酸による分解反応等について
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For synthesizing 2-isothiocyano-4-methylthiazole (I) by decompositive reaction, experiments were made by two processes shown in Chart I : (a) by decompositive reaction of 2-phenylthioureido-4-methylthiazole (II) with glacial acetic acid, and (b) by decomposition of 2-thioureido-4-methylthiazole (V) by heating in monochlorobenzene. As the consequence, as shown in Chart II, 2-acetylamino-4-methylthiazole (III) and phenylisothiocyanate (IV) were obtained by the process (a). By the process (b), however, in spite of qualititative presence of ammonia gas, it resulted in the recovery of the material (V) only. Under experimented conditions employed in the present study, it failed to obtain a compound with an absorption at 2130∿2040(cm)^<-1> which is peculiar to aromatic isothiocyanate band in the infrared spectra. Results of the qualititative analysis of this ammonia gas, for the investigation of the conditions for this reaction as well as the other processes described in Chart I will be reported later.
- 共立薬科大学の論文
- 1964-08-20
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