Allenes. Part 39. The synthesis of 3-alkyl-5-aminopyrazoles and 3H-indoles from allenic or acetylenic nitriles
作者:Z. Tanee Fomum、Stephen R. Landor、Phyllis D. Landor、George W. P. Mpango
DOI:10.1039/p19810002997
日期:——
Hydrazine adds to allenic or acetylenic nitriles to give 3-alkyl-substituted 5-aminopyrazoles in excellent yields. Conjugated and unconjugated enaminic nitriles may be isolated from the Michael addition of phenylhydrazine to allenic nitriles and ring-closed to give 3-alkyl-5-amino-N-phenylpyrazoles and 3H-indoles.