InCl<sub>3</sub>-Catalyzed Propargylation of Indoles and Phenols with Propargylic Acetates: Application to the Syntheses of Benzofurans and Naphthofurans
作者:Li Liu、Yong-Jun Chen、Zhe Liu、Zahid Shafiq、Yan-Chao Wu、Dong Wang
DOI:10.1055/s-2007-983735
日期:2007.7
InCl3-catalyzed propargylation of indoles and phenols was developed. A strategy combining propargylation with intramolecular cyclization was used to easily prepare 2-benzyl-3-arylbenzofurans and -naphthofurans, which are important pharmaceutical intermediates.
FeCl<sub>3</sub>-Catalyzed Coupling of Propargylic Acetates with Alcohols
作者:Zhuang-Ping Zhan、Hui-Juan Liu
DOI:10.1055/s-2006-949645
日期:2006.9
A new method for the synthesis of propargylic ethers by FeCl3-catalyzed alcoholysis of propargylic acetates was developed. The reaction was carried out at room temperature in acetonitrile without exclusion of moisture or air. High product yields were obtained with excellent reaction regioselectivity.
Electrophilic chemistry of propargylic alcohols in imidazolium ionic liquids: Propargylation of arenes and synthesis of propargylic ethers catalyzed by metallic triflates [Bi(OTf)3, Sc(OTf)3, Yb(OTf)3], TfOH, or B(C6F5)3
作者:Gopalakrishnan Aridoss、Viorel D. Sarca、James F. Ponder Jr、Jessica Crowe、Kenneth K. Laali
DOI:10.1039/c0ob00872a
日期:——
formed. Steric influence of the propargylic moiety on substrate selectivity is reflected in the lack of ortho propargylation for phenol and ethylbenzene by using propargylic alcohol Ia, and notable formation of the ortho isomer employing alcohol Ib. In the later case paraselectivity could be increased by running the reaction at r. t. for 10 h. The Bi(OTf)3-catalyzed reaction of 1,3-dimethoxybenzene with
PMA-silica gel has been utilized to catalyze efficiently the propargylation of aromaticcompounds with arylpropargyl alcohols in the absence of solvent under environmentally benign conditions.
作者:Joshua J. Kennedy-Smith、Lauren A. Young、F. Dean Toste
DOI:10.1021/ol049649p
日期:2004.4.1
A mild aromaticpropargylation reaction, employing an air- and moisture-tolerant rhenium-oxo complex ((dppm)ReOCl(3)) as a catalyst and a propargyl alcohol as the electrophile, is described. The reaction tolerates a broad range of functional groups and regioselectively affords propargylic arenas without formation of the isomeric allenyl adducts. The potential of this rhenium(V)-catalyzed reaction is