Alkaline Protease from<i>Bacillus subtilis</i>Catalyzed Michael Addition of Pyrimidine Derivatives to α,β-Ethylenic Compounds in Organic Media
作者:Xian-Fu Lin、Ying Cai、Xiao-Feng Sun、Na Wang
DOI:10.1055/s-2004-815982
日期:——
Michaeladdition reactions of pyrimidinederivatives to α,β-ethylenic compounds were catalyzed by an alkaline protease from Bacillus subtilis in DMSO at 50 °C. The structure of adducts were determined by 1R, NMR and MS. The yields were from 20% to 84%.
KF/Al<sub>2</sub>O<sub>3</sub>as a Highly Efficient, Green, Heterogeneous, and Reusable Catalytic System for the Solvent-Free Synthesis of Carboacyclic Nucleosides via Michael Addition Reaction
Abstract KF/Al2O3 acts as an efficient catalytic system for the synthesis of carboacyclic nucleosides via Michaeladdition of pyrimidine and purine nucleobases to α,β-unsaturated esters under solvent-free and microwave conditions. Using this method, the title compounds are produced in good to excellent yields and short reaction times.
Zinc oxide-tetrabutylammonium bromide tandem as a highly efficient, green, and reusable catalyst for the Michael addition of pyrimidine and purine nucleobases to α,β-unsaturated esters under solvent-free conditions
An efficient procedure for the synthesis of carboacyclic nucleosides via microwave-assisted Michaeladdition of pyrimidine and purine nucleobases to α,β-unsaturated esters in the presence of cataly...