Abstract
The reaction of 2-ethyl-6-aminobenzothiazole with methacrylyl chloride was used to synthesize the corresponding amide, which was then converted, without isolation, to 2-ethyl-3-methyl-6-methacrylylaminobenzothiazolium iodide. The reaction of the quaternary salt with nitro derivatives of salicylaldehyde leads to benzothiazolinospiropyrans containing a methacrylyl grouping. A copolymer of 3,3′-dimethyl-6-methacrylylamino-6′-nitrospiro-(benzothiazoline-2,2′-[2H-1]benzopyran) with methyl methacrylate was obtained. The photochromic properties of the synthesized benzothiazolinospiropyrans were investigated.
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