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2-Benzopyrylium salts. 27. Some transformations of 6-oxodibenzo[a,g]-quinolizinium salts

✍ Scribed by I. V. Shcherbakova; O. E. Shelepin; N. A. Klyuev; G. N. Dorofeenko; E. V. Kuznetsov

Book ID: 112345961
Publisher: Springer US
Year: 1982
Tongue: English
Weight: 581 KB
Volume: 18
Category: Article
ISSN: 0009-3122
DOI: 10.1007/bf00503198

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2-Benzopyrlium salts. XVIII. Synthesis o

2-Benzopyrlium salts. XVIII. Synthesis of 2-benzopyrylium salts based on some enol acylates

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2-Benzopyrylium salts. 34. Reactions of

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3-Carboxy-2-benzopyrylium salts form 3-carboxyisoquinolinium salts, their decarboxylated analogs, or products of contraction of the heterocycle, namely, cyclic ketols, depending on the nature of the amine and solvent. Upon treatment with acids, these ketols are demethylated through the intermediate

2-Benzopyrylium salts. 29. A new approac

2-Benzopyrylium salts. 29. A new approach to the synthesis of the natural alkaloid salsolidine using 2-benzopyrylium salts

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Photocyclization of Styrylbenzo[a]quinol

Photocyclization of Styrylbenzo[a]quinolizinium Salts, 2. Efficient Synthesis of 6a-Azonia[5]helicene Salts Utilizing Steric Interactions of Substituents

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## Abstract The synthesis of a series of substituted 6a‐azonia[5]helicene salts 3d–j and 12a‐azoniabenzo[__ghi__]perylene salts 4d and 4g by photocyclization of the corresponding 2‐styrylbenzo[__a__]‐quinolizinium derivatives 2d–j is described. The product ratios of 3d–j and 4d–j depend on the ster