Selective Solvent-Free and Additive-Free Oxidation of Primary Benzylic C–H Bonds with O2 Catalyzed by the Combination of Metalloporphyrin with N-Hydroxyphthalimide
作者:Hai-Min Shen、Bei Qi、Meng-Yun Hu、Lei Liu、Hong-Liang Ye、Yuan-Bin She
DOI:10.1007/s10562-020-03214-y
日期:2020.11
A protocol for solvent-free and additive-free oxidation of primary benzylic C–H bonds with O2 was presented through adjusting the combination of metalloporphyrins and NHPI as binary catalysts to overcome the deficiencies encountered in current oxidation systems. The effects of reaction temperature, porphyrin structure, central metal, catalyst loading and O2 pressure were investigated systematically
Catalytic generation of alkyl radicals from aldehydes via oxidative deformylation was realized using a cobalt-salen complex with H2O2. The deformylation was thought to proceed through homolytic cleavage of peroxohemiacetal intermediates to provide even primary alkyl radicals under mild conditions. Variously substituted and functionalized hydroperoxides were obtained from corresponding aldehydes in good yield
An indium(0)-metal-mediated efficient synthesis of benzylic hydroperoxides is described. The reaction proceeds efficiently with a broad range of benzyl bromides under aerobic conditions at room temperature to afford benzyl hydroperoxides in good to excellent yields. In addition, the tandem hydroperoxidation-Michael addition of (E)-1-(bromomethyl)-2-(2-nitrovinyl)benzene was also demonstrated.
NOVEL IMINO DERIVATIVES, METHODS FOR PRODUCING THE SAME AND INSECTICIDES CONTAINING THE SAME
申请人:Kagabu Shinzo
公开号:US20110172433A1
公开(公告)日:2011-07-14
[Technical Problem] To provide a novel imino derivative capable of being an insecticide compound having excellent characteristics such as sustained effects and broad spectrum.
[Solution to Problem] To provide an imino derivative represented by Formula (1).
wherein “Ar” denotes a heterocyclic group which may have a substituent on the ring; “X” denotes a sulfur atom or CH
2
, NR; “R” denotes a hydrogen atom or an alkyl group; “Y” is selected from COR
1
or CONR
3
R
4
, CONHCOR
5
, CO
2
R
9
; and each of “R
1
”, “R
3
”, “R
4
”, “R
5
”, and “R
9
” denotes a hydrogen atom or a certain substituent.
Chemoselective Decarboxylative Oxygenation of Carboxylic Acids To Access Ketones, Aldehydes, and Peroxides
作者:Renpeng Guan、Guanhong Chen、Elliot L. Bennett、Zhiliang Huang、Jianliang Xiao
DOI:10.1021/acs.orglett.3c00649
日期:2023.4.14
Reported here is a photocatalytic strategy for the chemoselective decarboxylative oxygenation of carboxylicacids using Ce(III) catalysts and O2 as the oxidant. By simply changing the base employed, we demonstrate that the selectivity of the reaction can be channeled to favor hydroperoxides or carbonyls, with each class of products obtained in good to excellent yields and high selectivity. Notably
此处报道的是一种使用 Ce(III) 催化剂和 O 2作为氧化剂的羧酸化学选择性脱羧氧化的光催化策略。通过简单地改变所用的碱,我们证明反应的选择性可以引导到有利于氢过氧化物或羰基化合物,每一类产品都以良好到极好的收率和高选择性获得。值得注意的是,有价值的酮、醛和过氧化物是直接从容易获得的羧酸中生产出来的,无需额外的步骤。