RUBELLO, ALBINO;VOGEL, PIERRE, HELV. CHIM. ACTA, 71,(1988) N 5, 1268-1280
作者:RUBELLO, ALBINO、VOGEL, PIERRE
DOI:——
日期:——
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