Quinolizinium salt synthesis

Dibenzo[a,g]quinolizinium salts, 5,6-dihydro-, 2, 547 Dibenzo[6,g]quinolizinium salts synthesis, 2, 565... 

Dibenzo[a/]quinolizinium (ion), 55, 264 Dibenzo[d/]quinolizinium salts, synthesis, 55, 291... 

Indole-2-carboxylic acids, 121, 252, 254 Indole-3-carboxylic acids, 253, 254 Indolenines, 84, 167, 169 dichloromethyl-, 68 quatemization of, 39 quinolines from, 69-71 ring expansion of, 69-71 Indolizmes, formylation of, 73 Indolo[l,2-a]pyrazinone, 119 Indolo[2,3-a]quinolizinium salts, synthesis of, 178... 

Quinolizinium picrate, 2-bromo-1-hydroxy-synthesis, 2, 543 Quinolizinium salts... 

Westphal synthesis, 2, 566 Woodward synthesis, 2, 551, 552 Quinolizinium salts, l-acetylamino-2,3-dimethyl-oxidation, 2, 540 Quinolizinium salts, 1-amino-synthesis, 2, 541 Quinolizinium salts, 2-amino-applications, 2, 569 diazotization, 2, 542 N-substituted... 

Quinolizinium salts, 2-amino-l-hydroxy-diazotization, 2, 542 Quinolizinium salts, l-amino-3-methyl-diazotization, 2, 542 Quinolizinium salts, 2-bromo-synthesis, 2, 544 Quinolizinium salts, carboxy-anhydrides... 

Quinolizinium salts, hydroxytetrahydro-reactions, 2, 549 synthesis, 2, 555, 556 Quinolizinium salts, 1-methyl-synthesis, 2, 552 Quinolizinium salts, 2-methyl-condensation reactions, 2, 539 Ortoleva-King reaction, 2, 540 Quinolizinium salts, 4-methyl-Ortoleva-King reaction, 2, 540 Quinolizinium salts, l-oxo-l,2,3,4-tetrahydro-reactions, 2, 549 synthesis, 2, 555... 

Quinolizinium salts, 2,4,6-trimethyl-condensation reactions, 2, 539 Quinolizinones reactions, 2, 544 synthesis, 2, 567 Quinolizinones, nitro-synthesis, 2, 568 Quinolizin-4-ones nitration, 2, 529 synthesis, 2, 565 2,2 -Quinolyl... 

Synthesis of a thiazolylpyridine via the Stille coupling has been reported [45, 46], Also described was a Stille coupling of a bromoquinolizinium salt 67 and 2-tributylstannylthiazole [47]. The reaction was conducted at room temperature to give a substituted quinolizinium salt... 

From the table it is clear that the synthesis has not proved useful except in the preparation of substituted quinolizinium compounds having at least one of its substituents at position 2. Beaman (51TH21000), in Woodward s laboratory, did succeed in obtaining some unsubstituted quinolizinium salts but the yields were reported to be very poor. 

Although the synthesis of 6,7-dihydrobenzo[a]quinolizinium salts was claimed (52YZ1273) many years ago, it was later shown (59CPB609) that the early report was in error. The first synthesis of the 6,7-dihydro derivative was finally accomplished by Akaboshi and Kato (63YZ1067) by a modification of the Pschorr synthesis (Scheme 93). The necessary amine... 

Table 8 Synthesis of Benzo[a]quinolizinium Salts (178) by Cyclization of Quaternary Salts (177) Derived from 2-Phenylpyridine (176) and its Congeners (Scheme 97)...

Quinolizinium picrate, 2-bromo-l-hydroxy-synthesis, 2, 543 Quinolizinium salts applications, 2, 569-570 deuteration, 2, 531 IR spectra, 2, 527 mass spectra, 2, 529 nucleophilic reactions, 2, 531 photodimerization, 2, 536 polymers, 1, 312 reactions... 

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