1,3-Dipolar cycloaddition or nucleophilic addition: Influence of solvents and nature of substituents in the reagent and substrate molecules on the reaction of 4,5-dihydro-1<i>H</i>-imidazole 3-oxides with alkynes
作者:Sergey A. Popov、Vladimir A. Reznikov
DOI:10.1002/jhet.5570430207
日期:2006.3
Two competitive processes - 1,3-dipolar cycloaddition and nucleophilic addition - in the reaction of 4,4,5,5-tetramethyl-4,5-dihydro-1H-imidazole 3-oxides with asymmetrically substituted alkynes were shown to occur. The influence of solvents and the nature of substituents in the reagent and substrate molecules on the rate ratio of these competitive processes were studied.
在4,4,5,5-四甲基-4,5-二氢-1 H-咪唑3-氧化物与不对称取代的炔烃的反应中,发生了两个竞争过程-1,3-偶极环加成和亲核加成。研究了溶剂以及试剂和底物分子中取代基的性质对这些竞争过程的速率比的影响。