Organic Ligand-Free Alkylation of Amines, Carboxamides, Sulfonamides, and Ketones by Using Alcohols Catalyzed by Heterogeneous Ag/Mo Oxides
作者:Xinjiang Cui、Yan Zhang、Feng Shi、Youquan Deng
DOI:10.1002/chem.201001915
日期:2011.1.17
that is, amines, carboxamides, sulfonamides, and ketones, were successfully synthesized through a borrowing‐hydrogen mechanism. Up to 99 % isolated yields were obtained under relatively mild conditions without additive organic ligand. The catalytic process shows promise for the efficient and economic synthesis of amine, carboxamide, sulfonamide, and ketone derivatives because of the simplicity of the
复杂且昂贵的有机配体通常在制备或工业水平的精细化学合成中必不可少。通过使用不具有添加剂有机配体的非均相催化剂体系来合成精细化学品是非常合乎需要的,但由于它们的通用性差和严格的反应条件而受到严格限制。在这里,我们显示了具有特定Ag 6 Mo 10 O 33的Ag / Mo杂化材料催化形成碳-氮或碳-碳键的结果晶体结构。通过借氢机制成功合成了48种含氮或氧的化合物,即胺,羧酰胺,磺酰胺和酮。在没有添加剂有机配体的条件下,在相对温和的条件下可获得高达99%的分离产率。催化过程显示出胺,羧酰胺,磺酰胺和酮衍生物的高效经济合成的希望,因为该系统简单且易于操作。
Palladium-Catalyzed<i>N-</i>Alkylation of Amides and Amines with Alcohols Employing the Aerobic Relay Race Methodology
reactions of amines/amides with alcohols in the past. By employing the aerobicrelayracemethodology with Pd‐catalyzed aerobicalcohol oxidation being a more effective protocol for alcohol activation, ligand‐free homogeneous palladiums are successfully used as active catalysts in the dehydrative N‐alkylation reactions, giving high yields and selectivities of the alkylated amides and amines. Mechanistic
Expedient Synthesis of Sulfinamides from Sulfonyl Chlorides
作者:Michael Harmata、Pinguan Zheng、Chaofeng Huang、Maria G. Gomes、Weijiang Ying、Kanok-On Ranyanil、Gayatri Balan、Nathan L. Calkins
DOI:10.1021/jo062296i
日期:2007.1.1
Sulfinamides were synthesized fromsulfonylchlorides using a procedure involving in situ reduction of sulfonylchlorides. The reaction is broad in scope and easy to perform.
A convenient synthesis of sulfonamidesand sulfonylazidesfromthiols is described. In situ preparation of sulfonyl chlorides fromthiols is accomplished by oxidation with N-chlorosuccinimide (NCS), tetrabutylammonium chloride, and water. The sulfonyl chlorides are then further allowed to react with excess amine or sodium azide in the same reaction vessel.
Borrowing Hydrogen in Water and Ionic Liquids: Iridium-Catalyzed Alkylation of Amines with Alcohols
作者:Ourida Saidi、A. John Blacker、Gareth W. Lamb、Stephen P. Marsden、James E. Taylor、Jonathan M. J. Williams
DOI:10.1021/op100024j
日期:2010.7.16
The use of [Cp*IrI2]2 as an efficient catalyst for the alkylation of amines by alcohols in either water or ionic liquid is described. Primary amines are converted into secondaryamines, and secondaryamines into tertiaryamines in the absence of base, and the chemistry has been applied to the synthesis of the analgesic fentanyl. The conversion of primary amines into N-heterocycles by the reaction with
描述了使用[Cp * IrI 2 ] 2作为在水或离子液体中通过醇使胺烷基化的有效催化剂。在不存在碱的情况下,伯胺被转化为仲胺,仲胺被转化为叔胺,并且该化学方法已经应用于止痛药芬太尼的合成。还描述了通过与二醇反应将伯胺转化为N-杂环以及磺酰胺的N-烷基化。