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PYRIDINE DERIVATIVES: PART VI MALONATIONS OF SUBSTITUTED NITROPYRIDINES

 

作者: W. Gruber,  

 

期刊: Canadian Journal of Chemistry  (NRC Available online 1953)
卷期: Volume 31, issue 12  

页码: 1181-1188

 

ISSN:0008-4042

 

年代: 1953

 

DOI:10.1139/v53-152

 

出版商: NRC Research Press

 

数据来源: NRC

 

摘要:

5-Hydroxy-2-alkylpyridines (VII) were prepared by a sequence of reactions starting with the malonation of 2-chloro-5-nitropyridine with diethyl alkylmalonates. Malonation failed with 4-methoxy-3-nitropyridine (VIII) and 2-chloro-3-nitropyridine (XII), yielding decomposition products only. Reactivity of the. methoxyl groups in 4-methoxy-3-nitropyridine (VIII) and in 2-methoxy-3-nitropyridine (XV) was compared with respect to the rearrangement to N-methylpyridone, the reaction with aromatic amines, and hydrolysis with dilute acids. Methylation of 2-hydroxy-3-nitropyridine yields either 2-methoxy-3-nitropyridine (XV) or N-methyl-3-nitro-2-pyridone (XVI) as can be expected.

 

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