Visible light-induced palladium-catalyzed ring opening β-H elimination and addition of cyclobutanone oxime esters
作者:Wei-Long Xing、Rui Shang、Guang-Zu Wang、Yao Fu
DOI:10.1039/c9cc08077e
日期:——
A palladium catalyst under visible light irradiation activates cyclobutanone oxime ester through single electron transfer to induce radical ringopening to generate hybrid cyanoalkyl Pd(I) radical species. Hybrid cyanoalkyl Pd(I) radical species can undergo either β-H elimination to deliver (E)-4-arylbut-3-enenitrile or undergo radical addition with silyl enol ether and enamide to generate δ-cyano
In-situ-generation of alkylsilyl peroxides from alkyl hydroperoxides and their subsequent copper-catalyzed functionalization with organosilicon compounds
Alkylsilyl peroxides were generated in situ from the corresponding alkyl hydroperoxides using organosilicon compounds of the type Me3SiX (X = CN, N3, and halogens) and an amine base. Subsequent in situ copper-catalyzed homolytic cleavage of the alkylsilyl peroxides afforded alkyl radicals, which were then trapped with X (X = CN, N3, and halogens) to furnish products with new carbon-carbon, carbon-nitrogen
A new approach for the copper-catalyzed functionalization of alkyl hydroperoxides with organosilicon compounds via in-situ-generated alkylsilyl peroxides
Using organosilicon compounds of the type Me3SiX (X = CN, N3, CnF2n+1, and halogens) and an amine base, alkylsilyl peroxides were generated in situ from the corresponding alkyl hydroperoxides. Subsequent in situ copper-catalyzed homolytic cleavage of the alkylsilyl peroxides afforded alkyl radicals, which were then trapped with a nucleophile X (X = CN, N3, CnF2n+1, and halogens) to furnish coupling
使用 Me 3 SiX 类型的有机硅化合物(X = CN、N 3、C n F 2n+1和卤素)和胺碱,由相应的烷基氢过氧化物原位生成烷基甲硅烷基过氧化物。随后的原位铜催化均裂烷基过氧化硅得到烷基自由基,然后被亲核试剂 X (X = CN, N 3 , C n F 2n+1, 和卤素) 以提供具有新碳-碳、碳-氮或碳-卤素键的偶联产物,产率从好到高。此外,1-(三甲基甲硅烷基)吗啉还可用于原位生成过氧化烷基甲硅烷基,随后高效地用于酰胺的N-烷基化、芳基化和硼基化。
Electrochemical Aerobic Oxygenation and Nitrogenation of Cyclic Alkenes via C═C Bond Cleavage or Oxygenation and Azidation of Open-Chain Alkenes
作者:Yan Zhu、Cong Jiang、Heng Li、Ping Liu、Peipei Sun
DOI:10.1021/acs.joc.2c01293
日期:2022.8.19
electrochemical C═C double-bond cleavage and functionalization of cyclic alkenes for the synthesis of ketonitriles is described. This transformation features environmentally friendly conditions and utilizes relatively safe TMSN3 as the nitrogenation reagent and molecular oxygen as the oxidant. For the open-chain alkenes, the reaction gave 1,2-difunctionalized products. A wide range of cyclic alkenes and open-chain
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。