4-(1,9a-Dihydro-2H-quinolizin-2-ylidene)morpholinium Salts from 4-(1-Methyl-3-phenyl-3-trifluoromethylsulfonyloxy-2-propenylidene)morpholinium Trifluoromethanesulfonate

Article abstract of DOI:10.1055/s-1989-27376

Treatment of title triflate 1 with two equivalents of pyridine yields the 4-(4-phenyl-1,9a-dihydro-2H-quinolizin-2-ylidene)morpholinium triflate (4).Similarly, quinoline and isoquinoline convert 1 into the benzodihydroquinolizine salts 6 and 7, respective