Chemistry of nitrosoimines. XVI. A new method for facile preparation of azamonomethinecyanines via nitrosoimines.

K Akiba, K Ishikawa, N Inamoto

文献索引：Akiba,K. et al. Bulletin of the Chemical Society of Japan, 1978 , vol. 51, p. 535 - 539

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被引用次数: 5

摘要

The reaction of 3-substituted 2-nitrosoimino-2, 3-dihydrobenzothiazoles (1) with Grignard- type reagents of 3-substituted 2-imino-2, 3-dihydrobenzothiazoles (2) gave azamonomethinecyanines (3) in high yields (71–96%). This is a new type of reaction for the preparation of 3. Hydrolysis of 3 afforded ring-opened disulfides, bis [o-{N-methyl-N-(3- methyl-2, 3-dihydrobenzothiazol-2-ylidenecarbamoyl) amino}-phenyl] disulfides, in high ...