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1, 2 - bis(3-Methylbenzo[b]thiophen-2-yl)cycloalkene derivatives 3a, 3b and 1- (2-methylbenzo[b]thiophen - 3 - yl ) - 2 - (3 - methylbenzo[b]thiophen - 2 - yl)cyclohexene 9 were synthesized. The obtained compounds exhibited photochromic property and the absorption bands of the colored forms 4a. 4b and 10 centered between 360-440 nm thus possessing the sensitivity at the wavelength of the newly developed InGaN diode laser.