Studies on Thiazoline Derivatives (XVI) : Synthesis of N-Alkyl-N'-cyano-N"-(3,4-dimethyl-4-thiazoline-2-ylidene) guanidine
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N-Alkyl-N'-cyano-N"-(3,4-dimethyl-4-thiazoline-2-ylidene) guanidine (3a-e) were prepared in two routes as outlined in Scheme 2. The structure of (3) was supported by elemental analysis, mass and NMR data. The IR spectra of (3) showed a characteristic absorption of ν<C≡N> at ca. 2130-2150 (cm)^<-1>. Treatment of (3) and (6), respectively, with conc. HCl gave N-(3,4-dimethyl-4-thiazoline-2-ylidene) biuret (4). The UV spectrum having the absorption maxima in 2-PrOH at 235nm and 298nm resembled that of the known compound (8). Furthermore, (3) in HCl-EtOH soln. was heated at 80-90° for 2-4 hr to give colourless crystals after neutralization. The products were identified as N-Alkyl-N'-ethoxycarbonyl-N"-(3,4-dimethyl-4-thiazoline-2-ylidene) guanidine (5a, c) on the basis of NMR data and elemental analysis.
- 共立薬科大学の論文
- 1978-02-26
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