A new and efficient one-pot synthesis of aromatic alkynyl ketones from aromatic esters
作者:Sang Jun Yim、Chan Ho Kwon、Duk Keun An
DOI:10.1016/j.tetlet.2007.06.015
日期:2007.7
The reaction of aromaticesters with alkynyllithiums in the presence of lithium morpholinide and BF3·OEt2 gave aromatic alkynyl ketones in good yield (78–87%).
Effective Partial Alkynylation of Carboxylic Acid Derivatives to Alkynyl Ketones
作者:Sang-Jun Yim、Min-Hyeok Kim、Duk-Keun An
DOI:10.5012/bkcs.2010.31.02.286
日期:2010.2.20
The reaction of carboxylic acid derivatives such as esters, acid chlorides and acid anhydrides with alkynyl lithiums in the presence of lithium morpholinide and $BF_3\cdot}OEt_2$ gave alkynyl ketones in good yield (73-96%).
iron(III)-catalyzed synthesis of substituted β-chlorovinyl ketones and α,β-alkynyl ketones from terminal and silyl-substituted alkynes with acidchlorides, respectively, is described. This method features easily available starting materials, a cheap and non-toxic catalyst, simple manipulation and mild reaction conditions. Evidence shows that the catalytic addition of the acidchloride to a terminal alkyne
Ligand-Promoted, Copper Nanoparticles Catalyzed Oxidation of Propargylic Alcohols with TBHP or Air as Oxidant
作者:Xiaoquan Yao、Chengyan Han、Min Yu、Weijiang Sun
DOI:10.1055/s-0030-1261227
日期:2011.10
A highly efficient oxidation of propargylicalcohols to ynones was catalyzed by copper nanoparticles (Cu Nps) with TBHP as an oxidant at room temperature. With bipyridine as the ligand, the reaction was accelerated significantly and led in good to excellent yields to a variety of propargylicalcohols. Furthermore, with Cu Nps as the catalyst, molecular oxygen in air could be utilized as oxidant effectively
Metal-Free Iodosulfonylation of Internal Alkynes: Stereodefined Access to Tetrasubstituted Olefins
作者:Ravi Kumar、Vikas Dwivedi、Maddi Sridhar Reddy
DOI:10.1002/adsc.201700576
日期:2017.8.17
The stereoselective E‐iodosulfonylation of internalalkynes for synthesizing highly defined tetrasubstituted olefins using sodium phenyl sulfinate and iodine has been achieved. Most of the alkynes explored are non‐symmetrical and the regioselection is under full control. Arylalkynes with various electron‐withdrawing groups like keto, aldehyde, ester, amide, cyano, sulfone, bromo, chloro and iodo on