The N,N‘-dioxide−Cu(I) complexes have been developed to catalyze the addition of nitromethane to N-tosyl aldimines. The aza-Henryreaction proceeds smoothly affording the corresponding nitro amines in good yields with high enantioselectivities. A catalytic cycle is proposed to explain the origin of reactivity.
The addition reaction of nitro compounds to azomethine functions, known as the aza-Henry (or nitro-Mannich) reaction was performed electrochemically under solvent and supporting electrolyte-free conditions. Reaction yields are very good and the method is very clean, avoiding the use of any classical solvent or catalyst.
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.
Aza-Henry Reaction Using DMSO as a Solvent
作者:Toshihiro Isobe、Atsuki Kato、Takeshi Oriyama
DOI:10.1246/cl.141185
日期:2015.4.5
Using dimethyl sulfoxide (DMSO) under the influence of molecular sieves (MS) 4A the aza-Henry reaction of various N-tosylimines with nitroalkanes proceeded smoothly to afford β-nitroamines in high ...