Selenazoles thioether-substituted

The preparation of substituted selenazole thioethers (Scheme 22) has already been described (35. 36). These compounds are obtained by the action of a haloketothioether on. for example, selenoacetamide. selenobenzamide, and A -ethylselenourea. These selenazoles have not been characterized, but they have been used as intermediates in the preparation of cyanine dyes. 

In two patents,the preparation of thioether-substituted selena-zoles of the general formula (6) have been described. These are stated to be formed by reaction of halogenoketothioethers with selenoamide components selenoacetamide, selenobenzamide, and A -ethylseleno-urea are given as examples. The resulting selenazoles were not further characterized. They are stated to be starting materials for the preparation of cyanine dyestuffs which are useful photographically. 

Substituted selenazole thioethers, intermediates in preparation of cyanine dyes, 236... 

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See also in sourсe #XX -- [ ]

See also in sourсe #XX -- [ ]

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