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Synthesis 1989; 1989(7): 515-518
DOI: 10.1055/s-1989-27303
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Eine neue Synthese von 2-Alkylthiopyryliumsalzen

D. Greif* , F. Kropfgans, M. Pulst, M. Weißenfels
  • *Sektion Chemie der Karl-Marx-Universität, Talstr. 35, DDR-7010 Leipzig, German Democratic Republic
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Publication Date:
17 September 2002 (online)

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A New Synthesis of 2-Alkylthiopyrylium salts 2-Alkylthiopyrylium salts are available in good yields via Aldol condensation reaction of β-chlorovinylaldehydes (carbonyl component) with acetone or α-methylene ketones (methylene component) followed by nucleophilic substitution reaction of the chlorine atom in the 4-acyl-1-chloro-1,3-butadienes by means of sodium sulfide and further cyclization of the resulting 4-acyl-1-mercapto-1,3-butadienes.

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