作者:Herbert Meier、Hans Christof Holst
DOI:10.1002/adsc.200303030
日期:2003.8
Star-shaped compounds 2a–e with a central benzene ring and six p-substituted, (E)-configured styryl groups have been prepared by a sequence of three-fold Heck and three-fold Wittig–Horner reactions. Alkoxy chains (OC3H7, OC6H13, OC10H21, OC12H25) on all six arms guarantee a good solubility of 2a–d, whereas the alternating hexyloxy and cyano substitution in 2e leads to an almost insoluble push-pull
通过一系列三倍的Heck反应和三倍的Wittig-Horner反应,制备了带有中心苯环和六个p取代,(E)构型的苯乙烯基的星形化合物2a–e。六个臂上的烷氧基链(OC 3 H 7,OC 6 H 13,OC 10 H 21,OC 12 H 25)确保2a–d的良好溶解性,而在2e中交替的己氧基和氰基取代导致几乎不溶推挽系统。辐射到2a–d的长波吸收中(λ最大值为341–342 nm)会导致统计上的光交联,其特征是所有二苯乙烯生色团完全降解。