Diels-Alder adducts of dicyanoacetylene and their electronic spectra
作者:R.C. Cookson、J. Dance、M. Godfrey
DOI:10.1016/0040-4020(68)88107-4
日期:1968.1
Dicyanoacetylene is a very reactive dienophile, forming Diels—Alder adducts with a wide variety of dienes, including durene. The UV spectra of the adducts include bands attributed to charge-transfer transitions with intensity borrowed from the local chromophores.
1-Bromo-1,2-dicyanoethylene: A dicyanoacetylene synthon useful in tetraazaporphyrin synthesis
作者:Jeffrey P. Fitzgerald、John P. Korenak、Delano A. Steinaker、Logan M. Swogger、Jessica A. Lois
DOI:10.1142/s1088424619501165
日期:2019.10
distillation. The resulting 5:1 mixture of geometric isomers reacts with dienes via a Diels–Alder reaction followed by elimination of HBr to give substituted maleonitriles. We demonstrate the utility of these reactions by reporting the synthesis of a novel, soluble tetraazaporphyrin bearing four 1,4-fused cyclohexyl groups on the macrocycle periphery.