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Amidrazones 9. Convenient Syntheses of 1-Alkyl-1-Phenylhydrazines and α,β-Unsaturated Amidrazones Via Base-Promoted Reactions of 1,1-Disubstituted-3-Amino-4,5-Dihydro-1H-Pyrazolium Salts

 

作者: RichardF. Smith,   LaurieA. Olson,   WilliamJ. Ryan,   KarenJ. Coffman,   JulienneM. Galante,   TimothyS. Wojdan,   PatriciaA. Mallardi,   ThomasP. Eckert,  

 

期刊: Synthetic Communications  （Taylor Available online 1986）
卷期: Volume 16, issue 5  

页码: 585-596

 

ISSN:0039-7911

 

年代: 1986

 

DOI:10.1080/00397918608078777

 

出版商: Taylor & Francis Group

 

数据来源: Taylor

 

摘要:

A simple, efficient procedure for the conversion of phenylhydrazine to 1-alkyl-1-phenylhydrazinesviabase-promoted hydrolysis of 1-alkyl-3-amino-4,5-dihydro-1-phenyl-1H-pyrazolium iodides (2) is described. N1, N1-disubstituted hydrazones oftrans-cinnamamide and acrylamide are obtained by Hofmann-type ring openings of 1,1 -disubstituted-3-amino-4,5-dihydro-5-phenyl (or 5-unsubstituted) -1H-pyrazolium halides (5, 7).

 

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