Metal‐Free, Visible‐Light‐Induced Selective C−C Bond Cleavage of Cycloalkanones with Molecular Oxygen
作者:Hong Xin、Xin‐Hua Duan、Le Liu、Li‐Na Guo
DOI:10.1002/chem.202001032
日期:2020.9.10
A metal‐free, visible‐light‐induced oxidative C−C bond cleavage of cycloketones with molecular oxygen is described. Cooperative Brønsted‐acidcatalysis and photocatalysis enabled selective C−C bond cleavage of cycloketones to generate an array of γ‐, δ‐ and ϵ‐keto esters under very mild conditions. Mechanistic studies indicate that singlet molecular oxygen (1O2) is responsible for this transformation
描述了环酮与分子氧的无金属,可见光诱导的氧化CC键裂解。布朗斯台德酸催化和光催化的协同作用使得在非常温和的条件下环酮的选择性C-C键裂解产生了一系列γ-,δ-和β-酮酯。机理研究表明,单线态分子氧(1 O 2)是造成这种转变的原因。
Organic peroxides containing functional groups. Part I. The preparation and properties of some α-oxo-hydroperoxides
作者:R. C. P. Cubbon、C. Hewlett
DOI:10.1039/j39680002978
日期:——
α-Oxo-hydroperoxides have been prepared by the low-temperature base-catalysedautoxidation of methyl isopropyl ketone, di-isopropyl ketone, and 2-methylcyclohexanone. The effect of variations of solvent and base on these autoxidation reactions has been studied. The α-oxo-hydroperoxide structure has been confirmed, and derivatives of both the hydroperoxide and carbonyl functions have been prepared.
A sustainable, cyanide-free synthesis of alkyl nitriles via the aerobic oxidative deconstruction of unstrained cycloalkanones with ammonium salts has been developed. Using inexpensive and stable ammonium salts as the nitrogen source, a variety of alkyl nitriles containing a distal carbonyl group were obtained in good yields under visible-light-promoted iron catalysis. This protocol is characterized
通过用铵盐对无张力环烷酮进行有氧氧化解构,开发了一种可持续、无氰化物的烷基腈合成方法。使用廉价且稳定的铵盐作为氮源,在可见光促进的铁催化下以良好的收率获得了多种含有远端羰基的烷基腈。该方案的特点是条件温和、材料丰富且环境友好、原子和步骤经济性高、废物产生最少。主要机理研究表明1 O 2很可能参与该反应。
DRULINER, J. D.;HOBBS, F. W.;SEIDEL, W. C., J. ORG. CHEM., 53,(1988) N 3, 700-702