[CH3:1][C:2]1[CH:7]=[C:6]([C:8]2[CH:13]=[CH:12][CH:11]=[CH:10][CH:9]=2)[C:5]([N:14]=[C:15]=[S:16])=[CH:4][CH:3]=1.[NH3:17]>C(O)C>[CH3:1][C:2]1[CH:3]=[CH:4][C:5]([NH:14][C:15]([NH2:17])=[S:16])=[C:6]([C:8]2[CH:13]=[CH:12][CH:11]=[CH:10][CH:9]=2)[CH:7]=1Reaction of 5-methyl-2-biphenylylisothiocyanate (7.5 g) in ethanol (20 ml) with 25% aqueous ammonia solution (60 ml) at ambient temperature for 2 hours yielded N-(5-methyl-2-biphenylyl)thiourea as a colourless solid (m.p. 175°-177° C.).
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