The oxidative annulation reaction of ethyl 3-oxo-3-phenylpropanoates with internal alkynes proceeds efficiently in the presence of a Ru(II)-catalyst, a copper oxidant and an additive such as AgSbF6 to give poly-substituted furans, which offers a novel method for the selective construction of poly-substituted furans. The reaction has wider substrate scope with simple starting materials, and the desired
3-氧代-3-苯基丙酸乙酯与内炔的氧化成环反应在 Ru( II )-催化剂、铜氧化剂和添加剂(例如 AgSbF 6 )存在下有效进行,得到多取代呋喃,该反应提供了选择性构建多取代呋喃的新方法 该反应具有更广泛的底物范围,起始原料简单,并且以良好至优异的产率制备了所需的四取代呋喃。
Photosensitized Oxidation of Furans; V<sup>1</sup>. An Efficient General Method for the Synthesis of 2-Aroylenol Esters
作者:M. L. Graziano、M. R. Iesce、B. Carli、R. Scarpati
DOI:10.1055/s-1982-29922
日期:——
GRAZIANO, M. L.;IESCE, M. R.;CARLI, B.;SCARPATI, R., SYNTHESIS, BRD, 1983, N 2, 125-126
作者:GRAZIANO, M. L.、IESCE, M. R.、CARLI, B.、SCARPATI, R.
DOI:——
日期:——
GRAZIANO, M. L.;MAYOL, L., J. HETEROCYCL. CHEM., 1984, 21, N 4, 1009-1011
作者:GRAZIANO, M. L.、MAYOL, L.
DOI:——
日期:——
Ionic Liquid as Catalyst and Reaction Medium: A Simple and Efficient Procedure for Paal–Knorr Furan Synthesis
作者:Gangqiang Wang、Zhi Guan、Rongchang Tang、Yanhong He
DOI:10.1080/00397910902978049
日期:2010.1.14
The ionicliquid 1-butyl-3-methyl-imidazolium hydrogen sulfate, [bmim]HSO4, efficiently catalyzes Paal–Knorr furan synthesis without any organic solvent. A wide range of aliphatic and aromatic 1,4-diketones easily undergo condensations to form furan derivatives, providing a general and convenient procedure. The Paal–Knorr reaction of ester-substituted 1,4-diketones is first reported. The ionic liquid