通过在1-(2-(3-叠氮基丙基)吡啶-3-基)烷酮下环化5-取代的6,7,8,9-四氢-5 H-吡啶并[3,2- c ] a庚烷的方法描述了Staudinger-aza-Wittig反应条件。整个反应过程包括八个步骤,可以制备克量的标题产物。在某些情况下,观察到了5,7,8,9-四氢氧哌啶[4,3- b ]吡啶衍生物的形成。
通过在1-(2-(3-叠氮基丙基)吡啶-3-基)烷酮下环化5-取代的6,7,8,9-四氢-5 H-吡啶并[3,2- c ] a庚烷的方法描述了Staudinger-aza-Wittig反应条件。整个反应过程包括八个步骤,可以制备克量的标题产物。在某些情况下,观察到了5,7,8,9-四氢氧哌啶[4,3- b ]吡啶衍生物的形成。
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 Chloro- and Bromopyridines Using Amido-Based Bimetallic Species and Regioselectivity-Computed CH Acidity Relationships
作者:Katia Snégaroff、Tan Tai Nguyen、Nada Marquise、Yury S. Halauko、Philip J. Harford、Thierry Roisnel、Vadim E. Matulis、Oleg A. Ivashkevich、Floris Chevallier、Andrew E. H. Wheatley、Philippe C. Gros、Florence Mongin
DOI:10.1002/chem.201101993
日期:2011.11.18
A series of chloro‐ and bromopyridines have been deprotometalated by using a range of 2,2,6,6‐tetramethylpiperidino‐based mixed lithium–metal combinations. Whereas lithium–zinc and lithium–cadmium bases afforded different mono‐ and diiodides after subsequent interception with iodine, complete regioselectivities were observed with the corresponding lithium–copper combination, as demonstrated by subsequent
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.
Annulation of furan-bridged 10-membered rings on N-heterocycles through [8+2] cycloaddition of dienylazaisobenzofurans and dimethyl acetylenedicarboxylate
作者:Priyabrata Roy、Binay K. Ghorai
DOI:10.1016/j.tetlet.2011.08.094
日期:2011.10
One-pot three-componentcoupling of o-alkynylheteroaryl carbonyl derivatives with α,β-unsaturated Fischer carbene complexes and dimethyl acetylenedicarboxylate leading to the synthesis of heterocyclic analogues of furanophane derivatives has been explored. This involves the generation of conformationally flexible dienylazaisobenzofuran intermediate as transient intermediates, which undergo [8+2] cycloaddition
A Simple Method for the Synthesis of 3-Arylthieno[2,3-b]pyridines via Iodine-Mediated Cyclization of 3-(1-Arylalkenyl)-2-[(1-phenylethyl)sulfanyl]pyridines
3-Arylthieno[2,3-b]pyridines are synthesized in a short four-step sequence from readily available 2-bromopyridines. The final and key step of the reported method involves an iodine-mediated 5-endo cyclization of 3-(1-arylalkenyl)-2-[(1-phenylethyl)sulfanyl]pyridines. thieno[2,3-b]pyridines - iodine - 2-bromopyridines - cyclization - heterocycles
3-芳基噻吩并[2,3- b ]吡啶是由很容易获得的2-溴吡啶以短的四步序列合成的。所报道的方法的最后和关键的步骤涉及碘介导的5-内切3-(1-芳基烯基)环化-2 - [(1-苯基乙基)硫基]吡啶。 噻吩并[2,3- b ]吡啶-碘-2-溴吡啶-环化-杂环