Only 1 mol % of K3PO4 is efficient enough to catalyze the hydroxymethylation of alpha-substituted nitroacetates in good to excellent yield. Both aliphatic and aryl substituted nitroacetates work well under this reaction. The first catalytic asymmetric version of this reaction also reported that 10 mol % of cupreidine could catalyze this reaction up to 71% ee and 89% yield. Paraformaldehyde and formalin could both serve as the hydroxymethylation C1 unit. The synthetic application of products is also demonstrated. (C) 2011 Elsevier Ltd. All rights reserved.
A Catalyst-Free, One-Pot Three-Component Aminomethylation of α-Substituted Nitroacetates: Theoretical and Experimental Studies into the Rate-Accelerating Effects of the Solvent Methanol
3, 2, 1 go! An unprecedented one‐pot, catalyst‐free, three‐component aminomethylation of α‐substituted nitroacetates, formalin, and amines has been reported, thereby enabling the highly efficient synthesis of α,β‐diamino acid precursors with great structural diversity.