Photoinduced, copper-catalyzed three-component radical annulation of gem-dialkylthio enynes, cyclobutanone oxime esters, and boronic acids was achieved, forming highlyfunctionalized aryl thienyl sulfides with both good chemo- and diastereoselectivities. The reaction proceeds through a domino sequence involving cyanoalkyl radical-mediated intramolecular annulation of gem-dialkylthio enyne, alkenyl
Iminyl Radical-Mediated Controlled Hydroxyalkylation of Remote C(<i>sp</i>
<sup>3</sup>
)-H Bond via Tandem 1,5-HAT and Difunctionalization of Aryl Alkenes
A visible‐lightmediated γ‐hydroxyalkylation of ketones via C(sp3)‐H functionalization has been developed under redox neutral conditions. This protocol relies on the iminyl radical‐triggered 1,5‐HAT followed by oxyalkylation of alkenes, wherein C−C and C−O bonds were constructed in one step. This three‐component reaction features mild conditions, wide substrate scope and excellent functional group
<i>O</i>-Perfluoropyridin-4-yl Oximes: Iminyl Radical Precursors for Photo- or Thermal-Induced N–O Cleavage in C(sp<sup>2</sup>)–C(sp<sup>3</sup>) Bond Formation
作者:Peng-Ju Xia、Yuan-Zhuo Hu、Zhi-Peng Ye、Xu-Jie Li、Hao-Yue Xiang、Hua Yang
DOI:10.1021/acs.joc.9b03251
日期:2020.3.6
group was first installed onto cycloketone oximes as a new electrophore, which was proven to be efficient iminyl radicalprecursors under photocatalytic and thermal conditions. A range of O-perfluoropyridin-4-yl oximes were successfully utilized in C(sp2)-C(sp3) bond formations of quinoxalin-2(1H)-ones and alkenes, providing facile accesses to a range of functionalized alkylnitriles.
A Rapid, Efficient Method for Deprotection of Oximes to Carbonyl Compounds with NaClO<sub>2</sub> in Water
作者:Yuan-Yuan Hao、Xian-Liang Zhao
DOI:10.2174/157017861201150112125024
日期:2015.1.1
A rapid, efficient method for deprotection of oximes to carbonyl compounds is demonstrated by using sodium
chlorite (NaClO2) in water. The protocol has been found to be applicable to a wide range of aldoximes and ketoximes with
good to excellent yields of the corresponding carbonyl compounds.