Copper(II)-Catalyzed Direct Dioxygenation of Alkenes with Air and N-Hydroxyphthalimide: Synthesis of β-Keto-N-alkoxyphthalimides
摘要:
Copper(II)-catalyzed direct dioxygenation of alkenes using air and a simple N-hydroxyphthalimide leading to beta-keto-N-alkoxyphthalimides has been developed. The reaction system is mild, efficient, and effective at room temperature with broad substrate scope and substantial steric hindrance. The radical-trapping and O-18-labeling experiments have been demonstrated.
An efficient catalytic approach for the synthesis of substituted peroxides, alcohols, and ketones through a catalyst-controlledhighlyselective dioxygenation of olefins has been demonstrated. The reported methods are mild and practical, can be switched by the selection of different catalytic systems, and employ peroxide as an oxidant and a reagent at room temperature.
A practical and simple selectfluor mediated highly selectiveradical dioxygenation of alkenes was achieved under mild conditions. Various hydroxylamines, such as N-Hydroxyphthalimide (NHPI), N-hydroxybenzotriazole (HOBt) and N-hydroxysuccinimide (NHSI), could react...
Electrochemical Oxidative Difunctionalization of Alkenes to Access α-Oxygenated Ketones
作者:Changhui Dai、Yijie Shen、Yifan Wei、Ping Liu、Peipei Sun
DOI:10.1021/acs.joc.1c01831
日期:2021.10.1
Dioxygenation of alkenes was developed by the combination of electrochemical synthesis and aerobic oxidation, leading to easy accessibility of α-oxygenated ketones in an eco-friendly fashion. Using air as the oxygen source and the absence of transition metals were the critical features of this protocol. A wide range of alkenes and N-hydroxyimides were found to be compatible and provided α-oxygenated
Cobalt Catalyst‐Controlled Selective Dioxygenation of Styrenes Using
<i>N‐</i>
Hydroxyphthalimide with Molecular Oxygen
作者:Xiaosong Hao、Huihui Ji、Hongju Zhan、Qian Zhang、Dong Li
DOI:10.1002/adsc.202100921
日期:2022.1.4
A cobalt-catalyzed selective dioxygenation of styrenes with N-hydroxyphthalimide (NHPI) was developed using molecular oxygen as the terminal oxidant. Alcohol and ketone products can be selectively formed from identical substrates by catalyst control. The reaction was applicable to a broad range of styrenes and exhibited good functional group tolerance. It provided a method for preparation of 1,2-diol
Gas-phase pyrolysis of N-alkoxyphthalimides to functionally substituted aldehydes: kinetic and mechanistic study
作者:Alya M. Al-Etaibi、Nouria A. Al-Awadi、Maher R. Ibrahim、Yehia A. Ibrahim
DOI:10.3998/ark.5550190.0011.a13
日期:——
Flash vacuum Pyrolysis (FVP) of primary N-alkoxyphthalimides at 400-500 o C and 0.02 Torr gave functionallysubstitutedaldehydes. A mechanism of this pyrolytic transformation was proposed based on the kinetic data and product analysis.
在 400-500 o C 和 0.02 Torr 条件下,伯 N-烷氧基邻苯二甲酰亚胺的快速真空热解 (FVP) 得到官能取代的醛。基于动力学数据和产物分析提出了这种热解转化的机制。