Suzuki–Miyaura cross-coupling of α-phosphoryloxy enol ethers with arylboronic acids
作者:Lee Pedzisa、Ian W. Vaughn、Rongson Pongdee
DOI:10.1016/j.tetlet.2008.04.116
日期:2008.6
The Suzuki–Miyauracross-coupling reaction of cyclic ketene acetal phosphates with arylboronicacids was found to be a convenient and highly efficient method for the construction of aryl vinyl ethers. A wide variety of differentially substituted electron-poor and electron-rich arylboronicacids smoothly underwent the coupling process to provide the desired dihydropyrans in moderate to excellent yields
Direct catalytic cross-coupling of alkenyllithium compounds
作者:Valentín Hornillos、Massimo Giannerini、Carlos Vila、Martín Fañanás-Mastral、Ben L. Feringa
DOI:10.1039/c4sc03117b
日期:——
A catalytic method for the direct cross-coupling of alkenyllithium reagents with aryl and alkenylhalides is described. The use of a catalyst comprising Pd2(dba)3/XPhos allows for the stereoselective preparation of a wide variety of substituted alkenes in high yields under mild conditions. In addition (1-ethoxyvinyl)lithium can be efficiently converted into substituted vinyl ethers which, after hydrolysis
Palladium-Catalyzed Cross-Coupling Reactions between Dihydropyranylindium Reagents and Aryl Halides. Synthesis of <i>C</i>-Aryl Glycals
作者:Ute Lehmann、Smita Awasthi、Thomas Minehan
DOI:10.1021/ol0345428
日期:2003.7.1
[reaction: see text] Palladium(0)-catalyzed cross-coupling reactions between tris(dihydropyranyl)indium 1 and aryl halides 2 have been investigated. Aryl iodides and electron-deficient aryl bromides couple efficiently with the in situ-generated indium reagents in the presence of 1-5 mol % Cl(2)Pd(PPh(3))(2) to produce substituted dihydropyrans 3 with minimal (<10%) dimer (4) formation. Organoindium
Preparation of C-arylglycals via Suzuki–Miyaura cross-coupling of dihydropyranylphosphates
作者:Michelle R. Leidy、J. Mason Hoffman、Rongson Pongdee
DOI:10.1016/j.tetlet.2013.10.031
日期:2013.12
The preparation of C-arylglycals has been accomplished by employing the Suzuki-Miyaura cross-coupling reaction of dihydropyranylphosphates with arylboronate esters. The reaction is tolerant of both electron-donating (EDG) and electron-withdrawing (EWG) groups on the aromatic ring and affords the corresponding C-arylglycals in good to excellent yields (68-97%). Additionally, the ketene acetal phosphate derived from 6-deoxy-3,4-di-O-benzyl-L-rhamnal also couples efficiently to yield C-arylglycals in excellent yields. (C) 2013 Elsevier Ltd. All rights reserved.
Reductive and Nonreductive Aromatization of Quinol Ketal Glycals. Models for the Preparation of C-Aryl Glycoside Natural Products