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- W2316235874 abstract "Pyridinium N-allylides, readily obtainable from pyridinium salts 4–11 in the presence of alkaline, react together or with acetylenic compounds to give 3-ethenyl-indolidine derivatives (12–16 respectively). N-Allylide 4 with pyridinium N-phenacylide afforded 3-benzoyl-indolidine (20) indicating 1,3-dipolarophilicity of such N-allylides. N-Allylide 5 with diphenylcyclopropenone gave 3,4-diphenyl salicylate (22). N-Allylides derived from salts 8–11 cyclized intramolecularly to give 3-unsubstituted indolidine derivatives (23–27). Structural elucidations were accomplished by physical and spectral means. The reactivities of pyridinium N-allylides and the formation mechanisms for the indolidine derivatives are also discussed." @default.
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- W2316235874 date "1972-01-01" @default.
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- W2316235874 title "Studies of heteroaromaticity—LXIV" @default.
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- W2316235874 doi "https://doi.org/10.1016/0040-4020(72)88146-8" @default.
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