title: Silica sulfuric acid promotes aza-Michael addition reactions under solvent-free condition as a heterogeneous and reusable catalyst.
abstract: A highly efficient, inexpensive, recyclable, convenient, and green protocol for chemoselective aza-Michael addition reactions of amines/thiols to alpha,beta-unsaturated compounds using silica sulfuric acid (SSA or SiO(2)-SO(3)H) was developed. This method is simple, convenient and the title compounds are produced in good to excellent yields.
authors.affiliation: Department of Chemistry and Biology, Lishui University, Lishui, Zhejiang 323000, China.
authors.forename: Yan
authors.initials: Y
authors.lastname: Wang
authors.forename: Yan-Qin
authors.initials: YQ
authors.lastname: Yuan
authors.forename: Sheng-Rong
authors.initials: SR
authors.lastname: Guo
mesh_terms: D000475:Alkenes / Q000737:chemistry; D002384:Catalysis; D015394:Molecular Structure; D012822:Silicon Dioxide / Q000737:chemistry*; D012997:Solvents / Q000737:chemistry*; D013464:Sulfuric Acids / Q000737:chemistry*
chemical_list: D000475:Alkenes; D012997:Solvents; D013464:Sulfuric Acids; D012822:Silicon Dioxide; C033158:sulfuric acid