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。
Zeolite nanofiber assemblies as acid catalysts with high activity for the acetalization of carbonyl compounds with alcohols
A novel, mesoporous molybdenum doped titanium dioxide/reduced graphene oxide composite as a green, highly efficient solid acid catalyst for acetalization
作者:Wimalika R. K. Thalgaspitiya、Tharindu Kankanam Kapuge、Junkai He、Peter Kerns、Andrew G. Meguerdichian、Steven L. Suib
DOI:10.1039/c9dt03633d
日期:——
A novel, mesoporous molybdenum doped titanium dioxide-reduced graphene oxide composite is synthesized as a highly efficient heterogeneous solid acid catalyst.