Synthesis of novel azonia  Helicenes containing terminal thiophene rings | Zendy

Sato Kiyoshi | Zendy; Yamagishi Takamichi | Zendy; Arai Sadao | Zendy

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Synthesis of novel azonia Helicenes containing terminal thiophene rings

Author(s) -

Sato Kiyoshi,

Yamagishi Takamichi,

Arai Sadao

Publication year - 2000

Publication title -

journal of heterocyclic chemistry

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.321

H-Index - 59

eISSN - 1943-5193

pISSN - 0022-152X

DOI - 10.1002/jhet.5570370453

Subject(s) - chemistry , knoevenagel condensation , thiophene , medicinal chemistry , condensation , stereochemistry , organic chemistry , catalysis , physics , thermodynamics

The Knoevenagel condensation of the 9‐methyl derivatives of thieno[3,2‐ a ]‐ and thieno[2,3‐ a ]‐quinolizinium salts ( 2b and 3b ) with appropriate arylaldehydes yielded 9‐(arylvinyl)thieno[3,2‐ a ]‐ and 9‐(arylvinyl)thieno[2,3‐ a ]quinolizinium salts ( 4a‐c and 5a‐c ), respectively, which underwent photocyclization to give a series of novel hetero[5]helicenes ( 6a,b and 7a‐d ) containing quinolizinium and thiophene rings.

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