The synthesis of thermally irreversible photochromic arylbutadienes has been demonstrated with a one-step reaction using commercially available ketones by McMurry cross-coupling. Although (Z)-5-(1-([1,1′-bi(cyclopentylidene)]-2-ylidene)ethyl)-4-methyl-2-phenylthiazole, a 1-(4-methyl-2-phenyl-5-thiazolyl)butadiene, showed poor photochromism, (Z)-5-(1-([1,1′-bi(cyclopentylidene)]-2-ylidene)ethyl)-2,4-dimethylthiazole, a 1-(2,4-dimethyl-5-thiazolyl)butadiene, showed stealth photochromic transformations by 313 and 366 nm light irradiation between the moderate conversion ratios of the open and closed forms.

中文翻译：

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芳基丁二烯的一步合成和隐身光致变色

已经通过麦克默里（McMurry）交叉偶联使用市售的酮通过一步反应证明了热不可逆的光致变色芳基丁二烯的合成。尽管（Z）-5-（1-（[（1,1'-二（环戊二烯）]-2-亚烷基）乙基）-4-甲基-2-苯基噻唑，1-（4-甲基-2-苯基- 5-噻唑基）丁二烯显示较差的光致变色现象，（Z）-5-（1-（[[1,1'-二（环戊二烯）]-2-亚烷基）乙基）-2,4-二甲基噻唑，1-（2 （4-二甲基-5-噻唑基）丁二烯在313和366 nm的光照射下，在开放和封闭形式的中等转化率之间显示出隐形光致变色转变。