An unprecedented facile oxidation of 1,3,5-trisubstitutedpyrazolines and Hantzsch 1,4-dihydropyridines (DHPs) to the corresponding pyrazoles and pyridines was observed, mediated by 3,4-dihydro-2H-pyran in air. The reaction showed excellent reactivity, functional group tolerance, and high yield without using any metal and/or halogen based oxidizing agents.
Heterocycles. 3. Synthesis and spectral data of some 2-pyrazolines
作者:Nizar R. El-Rayyes、George H. Hovakeemian、Hayat S. Hmoud
DOI:10.1021/je00036a038
日期:1984.4
Oxidative aromatization of 1,4-dihydropyridines and pyrazolines using HbA–H2O2: An efficient biomimetic catalyst system providing metabolites of drug candidates
作者:Atul Kumar、Ram Awatar Maurya、Siddharth Sharma
DOI:10.1016/j.bmcl.2009.05.056
日期:2009.8
Human hemoglobin (HbA) efficiently catalyses the oxidative aromatization of 1,4-dihydropyridines (1,4-DHPs) and pyrazolines with hydrogen peroxide in phosphate buffer. The results of the study reveal that the rates of oxidative aromatization of 1,4-DHPs are substituent dependent. Thus, the present study is very useful in understanding the metabolism of 1,4-DHP drugs in liver by cytochrome P450 and designing novel drugs as well as modifying the existing drugs for better pharmacokinetic profile. (C) 2009 Elsevier Ltd. All rights reserved.
Oxidative dehydrogenation of pyrazolines with cobalt(II) and oxygen
作者:Jayant N. Shah、Chandrakant K. Shah
DOI:10.1021/jo00400a060
日期:1978.3
Ingle; Doshi; Raut, Oriental Journal of Chemistry, 2010, vol. 26, # 4, p. 1517 - 1520