Diarylethenes were obtained from the corresponding ethenyl sulfones by photocatalyzed desulfonylation using UV or blue LEDs. When perylene and i-Pr2NEt were used as a photocatalyst and a sacrificing reagent, respectively, this desulfonylation proceeded smoothly to afford the desired ethenes with the functional groups such as chloro, alkoxy and heteroaromatic rings remaining untouched. The use of a flow photoreactor enabled this desulfonylation to proceed more rapidly to finish in an hour of residence time.
通过使用UV或蓝光LED进行光催化脱磺反应,从相应的
乙烯基砜中获得了二芳基
乙烯。当使用
苝和i-Pr2NEt分别作为光催化剂和牺牲剂时,这种脱磺反应顺利进行,得到的目标
乙烯化合物中的功能团(如
氯、烷氧基和杂芳环)保持不变。使用流动型光反应器使这种脱磺反应能够更快地完成,在停留时间为一小时内即可完成。