Syntheses and tandemDiels-Alder reactivities of 7,7-diphenyl-[2.2.1]hericene (= 7-(diphenylmethylidene)-2,3,5,6- tetramethylidenebicyclo[2.2.1]heptane) and 7-oxa[2.2.1]hericene ( = 2,3,5,6-tetramethylidenebicyclo[2.2.1]heptan-7-one)
作者:Albino Rubello、Pierre Vogel
DOI:10.1002/hlca.19880710538
日期:1988.8.10
Syntheses of 7,7-diphenyl[2.2.1]hericene (4) and 7-oxa[2.2.1]hericene (5) are presented. Rate constants k1 and k2 of the two successive Diels-Alder additions of ethylenetetracarbonitrile (TCE) to 4 and to 5 have been evaluated. At 25° in toluene, the rate-constant ratio k1/k2 = 260 and 21 for 4 and 5, respectively. These results are compared with those reported for the tandem Diels-Alder reactivity
提出了7,7-二苯基[2.2.1] her烯(4)和7-氧杂[2.2.1] her烯(5)的合成。评估了两个连续的Diels - Alder乙烯四甲腈(TCE)加至4和5的速率常数k 1和k 2。在甲苯中25°时,速率常数比k 1 / k 2 = 260和21对于4和5。将这些结果与串联Diels - Alder报告的结果进行比较 2,3,5,6-四亚甲基双环[2.2.1]庚烷和其他衍生物的反应性。