An efficient oxidation of 2-pyrazolines and isoxazolines by bis-bromine-1,4-diazabicyclo[2.2.2]octane complex (DABCO-Br2)
作者:Davood Azarifar、Kaveh Khosravi、Rahman Ali Veisi
DOI:10.3998/ark.5550190.0011.917
日期:——
An efficient and simple procedure has been developed for the oxidation of 1,3,5-trisubstituted 4,5-dihydro-1H-pyrazoles and -isoxazoles to their corresponding aromatic derivatives promoted by bis-bromine-1,4-diazabicyclo[2.2.2]octane complex (DABCO-Br2) in acetic acid at room temperature. The products 2-pyrazoles and isoxazoles were produced in good to excellent 87-95 % and 78-95 % yields respectively
已开发出一种有效且简单的程序,用于在双溴-1,4-二氮杂双环 [2.2] 的促进下将 1,3,5-三取代的 4,5-二氢-1H-吡唑和 -异恶唑氧化成相应的芳族衍生物。 2] 辛烷配合物 (DABCO-Br2) 在室温下的乙酸中。产物2-吡唑和异恶唑的产率分别为87-95%和78-95%。