An SiO<sub>2</sub>/ZnBr<sub>2</sub>mediated expeditious approach to 3-methyl-1-phenyl-1H-pyrazol-5(4H)-one derivatives in water under microwave irradiation
作者:Mehtab Parveen、Shaista Azaz、Ali Mohammed Malla、Faheem Ahmad、Musheer Ahmad、Mayank Gupta
DOI:10.1039/c5ra21146h
日期:——
An efficient and eco-friendly synthesis of pyrazolone derivatives.
一种高效环保的吡唑酮衍生物合成。
Diels-alder heterodiene in the reaction between 4-arylidene-5-pyrazolones and 2,3-dimethylbutadiene: the effect of acid catalysis(1)
The thermal reaction between (E) or (Z)-pyrazolones (1) and 2,3-dimethylbutadiene (2) gave 1,2-dimethyl-5-arylcyclohexen-4-spiro-4' (1'-phenyl-3'-substituted-5'-pyrazolones) (3, 4), from a Diels-Alder reaction, and 4-aryl-2-isopropenyl-2-methyl-5-substituted-7-phenyldihydropyran [3,2-d] pyrazoles (5, 6), from a heterodiene reaction. The effect of the configuration of the starting pyrazolone, as well