Synthesis of benzyl sulfides<i>via</i>substitution reaction at the sulfur of phosphinic acid thioesters
作者:Yoshitake Nishiyama、Takamitsu Hosoya、Suguru Yoshida
DOI:10.1039/d0cc02039g
日期:——
An ambident electrophilicity of phosphinicacid thioesters is disclosed. Unexpected carbon-sulfur bond formation took place in the reaction between phosphinicacid thioesters and benzyl Grignard reagents. The developed method for benzyl sulfides has a wide substrate scope and was applicable for the synthesis of a drug analog.
We report here an efficient, mild and biomolecule-compatible method for constructing C–S bonds.
我们在这里报告了一种高效、温和且生物分子兼容的构建C-S键的方法。
Halogen–lithium exchange versus deprotonation: regioselective mono- and dilithiation of aryl benzyl sulfides. A simple approach to α,2-dilithiotoluene equivalents
reactions between aryl benzyl sulfides and alkyllithiums were investigated. The resultant mono- and dilithiated intermediates were converted into the corresponding aldehydes and boronic, or carboxylic acids in good yields. It was found that diethyl ether stabilizes the ortho-lithiated compounds toward isomerisation to the benzylic derivatives. The process occurs easily in THF at low temperature and is
aryl iodides in the presence of catalytic amounts of [Pd(phen)2][PF6]2 resulted in the efficient formation of 3-arylated benzo[b]thiophenes, and a range of aryl iodides with electron-donating or -withdrawing groups could be used. While this reaction proceeded in the presence of aromatic and aliphatic groups on the terminal alkynyl carbon atom, silyl and alkoxycarbonyl groups hampered the reaction. Furthermore
在催化量的[Pd(phen)2 ] [PF 6 ] 2存在下,邻-(1-炔基)硫代苯甲醚与芳基碘的芳基环化反应可有效形成3-芳基苯并[ b ]噻吩可以使用一定范围的带有给电子或吸电子基团的芳基碘化物。尽管该反应在末端炔基碳原子上存在芳族和脂族基团的情况下进行,但是甲硅烷基和烷氧基羰基基团阻碍了反应。此外,该方法可扩展到由N,N-二甲基-o合成3芳基吲哚-(1-炔基)苯胺。所有这些反应都通过裂解碳-杂原子键而顺利进行。除所需的环化产物外,在硫原子上使用邻-(羟丙基)苯基甲基取代基提供了异色满,其应通过羟基分子内攻击苄基碳原子而形成。
I<sub>2</sub>-catalyzed oxidative C(sp<sup>3</sup>)–H/S–H coupling: utilizing alkanes and mercaptans as the nucleophiles
作者:Jiwen Yuan、Xu Ma、Hong Yi、Chao Liu、Aiwen Lei
DOI:10.1039/c4cc05661b
日期:——
By using alkanes and mercaptans as the nucleophiles with di-tert-butyl peroxide (DTBP) as the oxidant, I2-catalyzed oxidative C(sp(3))-H/S-H coupling was achieved. This protocol provides a novel process to construct C(sp(3))-S bonds from commercially available hydrocarbons and mercaptans.