Studies on Pyridinium N-Ylides: One Step Synthesis of Heteropolycycles, Indolizinoquinolizines
摘要:
The heteropolycycles, indolizinoquinolizines (3,4) were obtained by the reaction of pyridylketene dithioacetal (1) with two molar equivalents of pyridinium salts (2a,b).
One step synthesis of heteropolycycles, indolizinoquinolizines by the reaction of either pyridylketene dithioacetal with pyridinium salt or pyridiniumketene dithioacetal with pyridylacetonitrile
The heteropolycycles, indolizinoquinolizines (7, 8, 20) were obtained by the reaction of either pyridylketene dithioacetal (2) with two molar equivalents of pyridinium salts (4a-c) or pyridiniumketene dithioacetal (19) with two molar equivalents of pyridylacetonitrile (3) in the presence of triethylamine.