Visible-light induced decarboxylative coupling of redox-active esters with disulfides to construct C–S bonds
作者:Zhiwei Xiao、Lu Wang、Junjie Wei、Chongzhao Ran、Steven H. Liang、Jingjie Shang、Guang-Ying Chen、Chao Zheng
DOI:10.1039/d0cc00451k
日期:——
A novel method has been established for the construction of C–S bonds using redox-active esters with disulfides in the presence of Ru-photoredox catalyst.
Iron‐Catalysed Remote C(sp
<sup>3</sup>
)−H Azidation of
<i>O</i>
‐Acyl Oximes and
<i>N</i>
‐Acyloxy Imidates Enabled by 1,5‐Hydrogen Atom Transfer of Iminyl and Imidate Radicals: Synthesis of γ‐Azido Ketones and β‐Azido Alcohols
作者:Rubén O. Torres‐Ochoa、Alexandre Leclair、Qian Wang、Jieping Zhu
DOI:10.1002/chem.201901079
日期:2019.7.17
acetylacetonate [Fe(acac)3], the reaction of structurally diverse ketoxime esters with trimethylsilyl azide (TMSN3) afforded γ‐azido ketones in good to excellent yields. This unprecedented distal γ‐C(sp3)−H bond azidation reaction went through a sequence of reductive generation of an iminyl radical, 1,5‐hydrogen atom transfer (1,5‐HAT) and iron‐mediated redox azido transfer to the translocated carbon radical
phenyl sulfides 6 were found to insert zinc dust in THF underverymildconditions (10–25 °C, 0.5–2 h) leading to zinc α-thioorganometallics. After a transmetallation with CuCN·2 LiCl, the corresponding copper reagents 8 and 7 reacted with various electrophiles (1-haloalkynes, aldehydes, enones, acyl chlorides, allylic halides, trialkyltin halides) affording polyfunctional thioesters and sulfides of type