作者:Burkhard König、Peter Raster、Stefan Weiss、Gerhard Hilt
DOI:10.1055/s-0030-1258435
日期:2011.3
[2+2] cycloadditions. The reactions proceed under mild conditions and provide access to differently substituted diarylethene derivatives. All the diarylcyclobutene products undergo reversible photoisomerization upon irradiation with UV/Vis light. The ring-closed isomers show different thermal stabilities towards reisomerization with half-lives ranging from 9 to 300 hours. diarylethene - photoswitchable
通过钴催化的[2 + 2]环加成反应,由炔烃前体以20-70%的产率合成对称和不对称取代的二芳基环丁烯。反应在温和的条件下进行,并提供了获得不同取代的二芳基乙烯衍生物的途径。在紫外线/可见光照射下,所有二芳基环丁烯产物均经历可逆的光异构化。闭环异构体对再异构化表现出不同的热稳定性,半衰期为9至300小时。 二芳基乙烯-光开关-环丁烯-光致变色反应-[2 + 2]环加成