trapped with diphenylisobenzofuran to form two isomers: exo-addition of cyclopropenes and exo-addition of bicyclo[2.2.1]heptenes (exo-exo adducts) and endo-addition of cyclopropenes and exo-addition of bicyclo[2.2.1]heptenes (endo-exo adducts). The stereoselectivity of the Diels-Alder reactions of 6 and 7 with DPIBF is different. The exo-exo/endo-exo ratios of 6 and 7 with DPIBF are 2/1 and 1/2, respectively
两个1,2-桥连的
三环环
丙烯,
三环[3.2.1.0(2,4)] oct-2(4)-烯(6)和
三环[3.2.1.0(2,4)] octa-2(4),通过消除2-
溴-4-
氯三环[3.2.1.0(2,4)]
辛烷(17)和2-
溴-4-
氯三环[3.2.1.0(2,4),合成了6-二烯(7) )] oct-6-ene(8)。6和7均被二苯基
异苯并呋喃捕获以形成两个异构体:环
丙烯的外加和双环[2.2.1]庚烯的外加(外-外加合物)和环
丙烯的内加和双环[2.2的外加。 .1]庚烯(内-外加合物)。6和7与D
PIBF的Diels-Alder反应的立体选择性不同。D
PIBF的exo-exo / endo-exo比为6和7,分别为2/1和1/2。无论有无D
PIBF,exo-exo加合物12和18在回流
氯仿温度下均稳定,