photoswitch has been developed. This compound is ring-opened by light to a vinylheptafulvene (VHF), which is thermally closed back to DHA. This compound serves as an important starting material for dihydroazulene photoswitches incorporating a substituent in the seven-membered ring and as a reference compound for comparison of properties. A detailed NMR spectroscopic characterization has allowed the
已开发出一种经济有效的大规模合成 2-苯基-1,8adihydroazulene-1,1-dicarbonitrile (
DHA) 光开关的方案。这种化合物在光的作用下开环生成
乙烯基七富烯 (VHF),然后通过热封闭返回
DHA。该化合物可作为在七元环中加入取代基的二氢菘烯光开关的重要起始材料,并作为比较性能的参考化合物。详细的 NMR 光谱表征允许分配所有质子和碳信号。此外,该化合物通过 X 射线晶体学表征。建立了 VHF 到
DHA 的热闭环速率常数与溶剂极性 (ET30) 的经验参数之间的相关性。