PINDUR, ULF;PFEUFFER, LUDWIG;KIM, MYUNG-HWA, HELV. CHIM. ACTA, 72,(1989) N, C. 65-72
作者:PINDUR, ULF、PFEUFFER, LUDWIG、KIM, MYUNG-HWA
DOI:——
日期:——
PINDUR U.; PFEUFFER L., CHIMIA, 41,(1987) N 4, 125-126
作者:PINDUR U.、 PFEUFFER L.
DOI:——
日期:——
Locoselective [4 + 2] Cycloadditions of Vinylindoles with Inverse Electron Demand: A new access of indolyl-substituted and annellated pyridazines
作者:Ulf Pindur、Ludwig Pfeuffer、Myung-Hwa Kim
DOI:10.1002/hlca.19890720109
日期:1989.2.1
2-Vinylindole (1a) and its donor- and acceptor-substituted (E)-derivatives 1b–e react highly locoselectively with dimethyl 1,2,4,5-tetrazine-3,6-dicarboxylate (3) to form the novel (indol-2-yl)-1,4-dihydropyridazines 4a and 7 as well as the heterocyclic annellated pyridazines 4b, 5, and 6. The reactions of the structurally related 3-vinylindoles 2a–e with 3 also gave rise to new indol-3-ylpyridazines