Conversion of (Z)-1,4-dihydroxyalk-2-enes into 2,5-dihydrofurans and of alkane-1,4-diols into tetrahydrofurans via acid-catalysed cyclisation of the monoisoureas formed by their copper(i)-mediated reactions with dicyclohexylcarbodiimideElectronic supplementary information (ESI) available. Experimental data for compounds 14a–f, 15a–f, 7a–f, 22a–g, 21a–e and 2b–e: See http://www.rsc.org/suppdata/p1/b2/b203389p/
Regio- and Diastereoselective Copper(I)-Catalyzed Allylic Substitution of δ-Hydroxy Allylic Chlorides by a Silicon Nucleophile
作者:Chinmoy K. Hazra、Elisabeth Irran、Martin Oestreich
DOI:10.1002/ejoc.201300493
日期:2013.8
A perfectly γ-selectivecopper(I)-catalyzedallylic substitution of protected δ-hydroxy allylic chlorides with a silicon nucleophile generated by Si–B bond activation provides diastereoselective access to β-hydroxy α-chiralallylicsilanes with an anti relative configuration. The high levels of diastereocontrol of this rare allylic displacement are interpreted according to a model suggested by Nakamura
Stereoselective synthesis of substituted dienes by the double ortho ester Claisen rearrangement
作者:Suk-pyo Hong、Sung-jun Yoon、Byung-chan Yu
DOI:10.1016/j.tetlet.2004.12.015
日期:2005.1
This letter shows the highly stereoselective synthesis of substituted (E)-1,3-dienes from substituted propargylic diols via the double ortho ester Claisenrearrangement. The cyclohexyl-substituted diene undergoes thermal Diels–Alder cycloaddition with maleic anhydride to produce the corresponding bicyclic diester in highly stereoselective manner.
Efficient Synthesis of Fluoren-9-ones by the Palladium-Catalyzed Annulation of Arynes by 2-Haloarenecarboxaldehydes
作者:Jesse P. Waldo、Xiaoxia Zhang、Feng Shi、Richard C. Larock
DOI:10.1021/jo8009215
日期:2008.9.1
Fluoren-9-ones and derivatives are readily prepared in good yields by the annulation of in situ generated arynes by 2-haloarenecarboxaldehydes in the presence of a palladium catalyst.
Electrophilic Cyclization of Phenylalkynediols to Naphthyl(aryl)iodonium Triflates with Chelating Hydroxyls: Preparation and X-ray Analyses
作者:Robert J. Hinkle、Sarah E. Bredenkamp、Robert D. Pike、Seong Ik Cheon
DOI:10.1021/acs.joc.7b01619
日期:2017.11.17
PhI+CN–OTf (Stang’s reagent) or 3,5-(CF3)2C6H3I+CN–OTf to afford naphthyl(aryl)iodonium triflates. The reaction occurs at room temperature over the course of 6–12 h and provides 36–82% yields of microcrystalline solids. Slow diffusion of Et2O into CH3CN solutions of the salts afforded X-ray quality crystals of five compounds with hydroxyl groups forming five- and six-membered chelation complexes with the
含有一种炔丙醇和另一种炔丙醇或均丙炔醇的炔二醇与PhI + CN - OTf(Stang's试剂)或3,5-(CF 3)2 C 6 H 3 I + CN - OTf反应制得萘基(芳基)碘鎓三氟甲磺酸。该反应在室温下进行6-12小时,可提供36-82%的微晶固体收率。Et 2 O缓慢扩散到CH 3中盐的CN溶液可提供五种带有羟基的化合物的X射线质量晶体,该化合物与碘原子形成五元和六元螯合配合物。大规模反应(≥〜0.25 mmol)的结晶通常易于从CH 2 Cl 2进行。
Schulze,K. et al., Journal fur praktische Chemie (Leipzig 1954), 1976, vol. 318, p. 381 - 389