New Gilman-type lithium cuprate from a copper(II) salt: synthesis and deprotonative cupration of aromatics
作者:Tan Tai Nguyen、Floris Chevallier、Viatcheslav Jouikov、Florence Mongin
DOI:10.1016/j.tetlet.2009.09.100
日期:2009.12
including heterocycles (anisole, 1,4-dimethoxybenzene, thiophene, furan, 2-fluoropyridine, 2-chloropyridine, 2-bromopyridine, and 2,4-dimethoxypyrimidine) was realized in tetrahydrofuran at room temperature using the Gilman-type amido-cuprate (TMP)2CuLi in situ prepared from CuCl2·TMEDA through successive addition of 1 equiv of butyllithium and 2 equiv of LiTMP. The intermediate lithium (hetero)arylcuprates
Deprotonative Metalation of Aromatic Compounds by Using an Amino-Based Lithium Cuprate
作者:Tan Tai Nguyen、Nada Marquise、Floris Chevallier、Florence Mongin
DOI:10.1002/chem.201100990
日期:2011.9.5
employed to attempt the interception of the generated aryl cuprates, aroyl chlorides, iodomethane, and diphenyl disulfide efficiently reacted. In addition, different oxidative agents were identified to afford symmetrical biaryls. Finally, palladium‐catalyzed coupling with arylhalides was optimized and allowed the synthesis of different arylderivatives in medium to good yields.
Functionalization of pyridyl ketones using deprotolithiation-in situ zincation
作者:Madani Hedidi、William Erb、Frédéric Lassagne、Yury S. Halauko、Oleg A. Ivashkevich、Vadim E. Matulis、Thierry Roisnel、Ghenia Bentabed-Ababsa、Florence Mongin
DOI:10.1039/c6ra11370b
日期:——
The metallation of arylketones was achieved by using LiTMP in the presence of ZnCl2·TMEDA, as evidenced by subsequent interception with iodine or by a palladium-catalysed cross-coupling reaction. One of the synthesized iodo ketones has been further elaborated to reach derivatives of biological interest.
A facile synthesis of 2,3-disubstituted furo[2,3-b]pyridines
作者:Gregory L. Beutner、Jeffrey T. Kuethe、Nobuyoshi Yasuda
DOI:10.1016/j.tetlet.2008.11.125
日期:2009.2
In a three-step sequence starting from readily available starting materials, 2,3-carbon disubstituted furo[2,3-b]pyridines can be accessed in good yields and purity. Furo[2,3-b]pyridines bearing ester, amide and ketone groups at the 2-position can be prepared with a variety of aryl and alkyl groups at the 3-position.
从容易获得的起始原料开始的三个步骤的序列中,可以以良好的收率和纯度获得2,3-碳二取代的呋喃并[2,3- b ]吡啶。可以制备在2-位带有酯,酰胺和酮基的呋喃[2,3- b ]吡啶,在3-位带有各种芳基和烷基。
Convenient Stille carbonylative cross-couplings using molybdenum hexacarbonyl
Palladium catalysis was used in Stille-type carbonylative cross-couplings employing Mo(CO)6 as the carbon monoxide source. Robust and convenient transformations were carried out in closed vessels at 100 °C, providing a set of diarylketones in good yields. Aryl triflates and bromides were used as coupling partners with aryl stannanes. Inclusion of the Mo(CO)6 destabilizing agent DBU made this protocol