Hydroxymethylation of active methenyl compounds: DMSO as methylene source and H2O as oxygen source
作者:Liang Zhang、Shuhua Liu、Yunliang Lin、Yuliang Wang
DOI:10.1016/j.tetlet.2022.153663
日期:2022.3
and efficient method for hydroxymethylation of active methenyl compounds has been described. In this transformation, the widely available solvents DMSO and H2O served as methylene and oxygen sources, respectively. Under promotion of activator and base, the reaction could be used for the construction of a series of α-hydroxymethylated carbonyl compounds with all-carbon quaternary carbon center in good
已经描述了一种温和有效的活性亚甲基化合物羟甲基化方法。在这种转化中,广泛使用的溶剂 DMSO 和 H 2 O 分别作为亚甲基和氧源。在活化剂和碱的促进下,该反应可用于构建一系列全碳季碳中心的α-羟甲基化羰基化合物,收率良好。
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.
Kinetics and mechanism of the reversible decomposition of certain nitroalcohols in water
作者:V. M. Belikov、Yu. N. Belokon'、N. S. Martinkova、N. G. Faleev