A novel access to deuterated and D3CO-substituted arenes has been developed using immobilized triazenes as precursors. The linker system and the deuterating cleavage methodology could be shown to be compatible with various functional groups and are therefore suitable for the synthesis of derivatives only hardly available via comparable protocols.
Trideuteromethylation Enabled by a Sulfoxonium Metathesis Reaction
作者:Zuyuan Shen、Shilei Zhang、Huihui Geng、Jiarui Wang、Xinyu Zhang、Anqi Zhou、Cheng Yao、Xiaobei Chen、Wei Wang
DOI:10.1021/acs.orglett.8b03641
日期:2019.1.18
A conceptually novel sulfoxonium metathesisreaction between TMSOI and cost-effective DMSO-d6 is developed for the efficient generation of a new trideuteromethylation reagent TDMSOI. The new reagent TDMSOI is produced highly efficiently by simply heating a mixture of TMSOI and DMSO-d6 and directly used for subsequent trideuteromethylation in a “one-pot” operation. The preparative power of the new versatile
TMSOI 和经济高效的 DMSO- d 6之间的概念上新颖的硫鎓复分解反应被开发出来,用于有效生成新型三氘代甲基化试剂 TDMSOI。新试剂TDMSOI只需加热TMSOI和DMSO- d 6的混合物即可高效生产,并直接用于后续的“一锅”操作中的三氘代甲基化。新的多功能试剂和“一锅”方案的制备能力通过其以高产率和有用的方式将-CD 3部分安装到广泛的功能中而得到证明,包括苯酚、苯硫酚、酸性胺和烯醇化亚甲基单元。氘化水平 (>87% D)。
Hydrogen Bond Donor and Unbalanced Ion Pair Promoter-Assisted Gold-Catalyzed Carbon–Oxygen Cross-Coupling of (Hetero)aryl Iodides with Alcohols
作者:Guifang Chen、Bo Xu
DOI:10.1021/acscatal.2c05890
日期:2023.2.3
We have developed an efficient gold-catalyzed C–O cross-couplingreaction of (hetero)aryliodides with primary and secondary alcohols via an AuI–AuIII catalytic cycle. This protocol featured moisture/air insensitivity, simple operation, and excellent functional group tolerance. Good yields were obtained regardless of steric hindrance and electronic factor (electron-rich or poor) of substrates, and
我们通过 Au I -Au III催化循环开发了一种有效的金催化的(杂)芳基碘化物与伯醇和仲醇的 C-O 交叉偶联反应。该协议具有水分/空气不敏感性、操作简单和出色的官能团耐受性。无论底物的空间位阻和电子因素(富电子或贫电子)如何,都获得了良好的产率,并且可以保留手性醇起始材料的手性。我们的协议适用于分子间和分子内偶联。此外,将 RuPhos 配体应用于金催化的交叉偶联。不平衡的离子对促进剂和氢键供体溶剂可能在这种转化中至关重要。
Saljoughian, Manouchehr; Morimoto, Hiromi; Williams, Philip G., Journal of the Chemical Society. Perkin transactions I, 1990, # 6, p. 1803 - 1808
作者:Saljoughian, Manouchehr、Morimoto, Hiromi、Williams, Philip G.
DOI:——
日期:——
Selective C–O Bond Reduction and Borylation of Aryl Ethers Catalyzed by a Rhodium–Aluminum Heterobimetallic Complex
We report the catalytic reduction of a C–Obond and the borylation by a rhodium complex bearing an X-type PAlP pincer ligand. We have revealed the reaction mechanism based on the characterization of the reaction intermediate and deuterium-labeling experiments. Notably, this novel catalytic system shows steric-hindrance-dependent chemoselectivity that is distinct from conventional Ni-based catalysts