K. Bowden, E. A. Braude, E. R. H. Jones and B. C. L. Weedon, “Researches on Acetylinic Compounds. Part II. A. The Addition of Amines to Ethynyl Ketones. B. Auxochromic Properties and Conjugating Power of the Amino Group,” Journal of the Chemical Society, 1946, pp. 45-52.

has been cited by the following article:

• TITLE: Synthesis of Novel Bis-enaminones by KHSO4-assisted Facile Michael Addition-elimination Reaction of 3-(dimethylamino)-1-phenylprop-2-en-1-ones with Diamines in Water

  AUTHORS: Asem Satyapati Devi, Philippe Helissey, Jai Narain Vishwakarma

  KEYWORDS: Enaminone, Bis-enaminone, Formylated Acetophenone, Michael Addition-Elimination, Formylation, Dimethylformamide-dimethylacetal

  JOURNAL NAME: Green and Sustainable Chemistry, Vol.1 No.2, April 13, 2011

  ABSTRACT: 3-(Dimethylamino)-1-phenylprop-2-en-1-ones (formylated acetophenones) 1 reacted with aliphatic diamines in water assisted by KHSO4 to give bis-enaminones 2a-h in good yields. Compound 1 also reacted with o-phenylenediamine under similar conditions to produce bis-enaminones 3 instead of benzodiazepines 4 in excellent yields.