The reactions of semicarbazide and thiosemicarbazide with ferrocenyl-substituted α,β-enones
摘要:
Semicarbazide (hydrochloride) and thiosemicarbazide react with alpha,beta -unsaturated ketones of the ferrocene series in excess of ' BuOK to give 1-carbamoyl- and 1-thiocarbamoyl(ferrocenyl)-4,5-dihydropyrazoles. The condensation with thiosemicarbazide is accompanied by the fragmentation of the starting alpha,beta -enones resulting in ferrocenecarbaldehyde or acetylferrocene thiosemicarbazones. (C) 2001 Elsevier Science B.V. All rights reserved.