Synthesis of cyclopentadiene derivatives by retro-Diels–Alder reaction of norbornadiene derivatives
作者:Erdin Dalkılıç、Arif Daştan
DOI:10.1016/j.tet.2015.02.023
日期:2015.4
Synthesis of cyclopentadiene derivatives starting from norbornadiene was investigated using dimethyl 1,2,4,5-tetrazine-3,6-dicarboxylate. The products obtained were either cyclopentadienes or diazines depending on the substituents. The driving force for the formation of these products was discussed in terms of electronic effects.
glycosides were applied to the reaction smoothly, and N-alkyl (primary, secondary and tertiary) C4-glycosidic indoles can also be obtained by this method. In terms of mechanism, the key ANP intermediates characterized by X-ray single-crystal diffraction and further controlled experiments proved that the migration-insertion of smNBDs with phenylpalladium intermediate endows them with high chemo- and
作者:Lucchi, Ottorino De、Piccolrovazzi, Nicoletta、Licini, Giulia、Modena, Giorgio、Valle, Giovanni
DOI:——
日期:——
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.