A Facile and Convenient Synthetic Route to 1-Amino-4,4-bis(trifluoroacetyl)- and 1-Amino-4-trifluoroacetyl-1,3-butadienes

Authors:
  • MHMasaru Hojo
    Masaru Hojo
  • RMRyōichi Masuda
    Ryōichi Masuda
  • EOEtsuji Okada
    Etsuji Okada
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Abstract
Ring cleavage of 2-ethoxy-4-isobutoxy-5-trifluoroacetyl-6-trifluoromethyl-3, 4-dihydro-2H-pyran (1) with various secondary amines gives 1-amino-4, 4-bis(trifluoroacetyl)-1,3-butadienes 2a-f in excellent yields. Deacylation of compounds 2a-d by hydrochloric acid gives the corresponding monoacyl derivatives 3a-d in fair yields.