ENAMINE CHEMISTRY-XXII; THE PREPARATION OF 4-ACYLAMINOPENT-3-EN-2-ONES AND THE CORRESPONDING ENAMINO-THIONES

Article abstract of DOI:10.1016/S0040-4020(01)98950-1

Acylation of 4-aminopent-3-en-2-one, 5, with different acid chlorides, RCOCl (R=Me, Me2CH, Me3C, C6H5, ClCH2) gives only N-acylated products, 6, in high yields.The N-acylated enaminones, 5, are shown only to exist in the Z-s-Z form in solution.The UV spec