REACTIONS OF<i>N</i>-BROMO DERIVATIVES OF 2-IMINOBENZOTHIAZOLINES WITH THEIR<i>N</i>-GRIGNARD-TYPE REAGENTS
作者:Kin-ya Akiba、Kiyofumi Ishikawa、Naoki Inamoto
DOI:10.1246/cl.1976.1111
日期:1976.10.5
3-(3′-Methylbenzothiazolinylideneamino)-4-methyl-1,2,4-benzothiadiazine, the ring-enlarged product, was obtained in 67% yield in the reaction of 2-bromoimino-3-methylbenzothiazoline with N-Grignard-type reagent of 2-imino-3-methylbenzothiazoline. On the other hand, bis[o-(N-phenylcyanamino)phenyl] disulfide was obtained in 65–87% yield in the reaction of 3-susbtituted 2-bromoiminobenzothiazoline with N-Grignard-type reagent of 2-imino-3-phenylbenzothiazoline which proceeds via the oxidation of the thiolate with the bromide, the former being produced by ring-opening equilibrium of the N-Grignard-type reagent.
在 2-溴亚氨基-3-甲基苯并噻唑啉与 2-亚氨基-3-甲基苯并噻唑啉的 N-格氏型试剂反应中,可获得 67%的环扩大产物 3-(3′-甲基苯并噻唑啉亚氨基)-4-甲基-1,2,4-苯并噻二嗪。另一方面,2-亚氨基-3-甲基苯并噻唑啉与 2-亚氨基-3-甲基苯并噻唑啉的 N-格氏型试剂发生反应,通过硫酸盐与溴化物的氧化作用,前者通过 N-格氏型试剂的开环平衡生成双[邻(N-苯基氰基氨基)苯基]二硫化物,收率为 65-87%。