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- W1970197968 abstract "All isomers of (monomethyl)benzo[a]quinolizinium salts including five new monomethyl derivatives were prepared by photocyclization, sulfur extrusion, or cyclodehydration reaction, and their aldol-type condensation was examined. The 2- and 4-methyl derivatives 3b and 3c reacted with p-methoxybenzaldehyde in the presence of piperidine to yield trans-(p-methoxystyryl)benzo[a]quinolizinium salts 11. The other methyl derivatives did not react with the aldehyde. The methyl group was reactive at the 2- and 4-positions, located para and ortho to the azonia ring nitrogen, respectively; however, it was unreactive at the 6-position located at another ortho position." @default.
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- W1970197968 date "1990-05-01" @default.
- W1970197968 modified "2023-09-24" @default.
- W1970197968 title "Synthesis and reaction of methylbenzo[a]quinolizinium salts" @default.
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- W1970197968 doi "https://doi.org/10.1002/jhet.5570270448" @default.
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