Synthesis and regioselective [4+2] cycloaddition/nucleophilic reactions of N-arylamino-1:3-diaza-1:3-butadienes with ketenes and accompanying rearrangements

Paramita D. Dey, Arun Sharma, Sachchida N. Rai, Mohinder P. Mahajan

Research output: Contribution to journalArticle

28 Scopus citations


N-Arylamino-1:3-diaza-1:3-butadienes 4 are shown to undergo regioselective reactions with phenyl- and chloroketenes resulting in high yields of 3-aryl-2-methylthio6-phenyl-4(3H)-pyrimidinones 7. Similar reactions with bromo- and iodoketenes, resulted, via aziridinium intermediates 12, in good yields of 3-aryl-S-(N-arylamino)-2-methylthio-6-phenyl4(3H)-pyrimidinones 13, The mechanistic aspects of cycloadditions and semi-empirical AM1 calculations for these diazabutadienes are also reported.

Original languageEnglish (US)
Pages (from-to)7459-7468
Number of pages10
Issue number27
Publication statusPublished - Jul 3 1995


All Science Journal Classification (ASJC) codes

  • Biochemistry
  • Drug Discovery
  • Organic Chemistry

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