Synthesis of β-Nitroamines Using Nanocrystalline MgO
摘要:
Nanocrystalline magnesium oxide (NAP-MgO) was found to be an effective heterogeneous, solid base catalyst for the direct aza-Henry reaction of nitroalkanes and various N-arylidene-4-methylbenzenesulfonamides to afford the corresponding beta-nitroamines in excellent yields under mild conditions. The catalyst was recovered by simple centrifugation and reused for three cycles with consistent activity.
value of the methodology described is demonstrated by providing (a) a direct route for the asymmetricsynthesis of differently substituted 1,2-diamines and (b) a new asymmetricsynthesis of gamma-amino alpha,beta-unsaturated esters through a catalytic, highly enantioselective formal addition of functionalized alkenyl groups to azomethines. Finally, a preferred TS that nicely fits the observed enantioselectivity
Synthesis of <font>β</font>-Nitroamines Using Nanocrystalline MgO
作者:L. Chakrapani、M. Lakshmi Kantam
DOI:10.1080/00397911003707147
日期:2011.12.1
Nanocrystalline magnesium oxide (NAP-MgO) was found to be an effective heterogeneous, solid base catalyst for the direct aza-Henry reaction of nitroalkanes and various N-arylidene-4-methylbenzenesulfonamides to afford the corresponding beta-nitroamines in excellent yields under mild conditions. The catalyst was recovered by simple centrifugation and reused for three cycles with consistent activity.