Heteroaromatic Tosylates as Electrophiles in Regioselective Mizoroki-Heck-Coupling Reactions with Electron-Rich Olefins
作者:Thomas M. Gøgsig、Anders T. Lindhardt、Mouloud Dekhane、Julie Grouleff、Troels Skrydstrup
DOI:10.1002/chem.200900313
日期:2009.6.8
Easy and direct: Regioselective Mizoroki–Heck‐coupling reactions using heteroaromatictosylates as electrophiles were achieved, thus providing direct and easy access to highly functionalized α‐heteroarylvinyl amides and ethers.
A novel synthetic methodology of preparing tetrahydro-2(1H)-quinolones by Diels–Alder reactions between 2-methyl- and 2,3-dimethyl-1,3-butadienes and 1-arylsulfonyl-2(1H)-pyridones having an electron-withdrawing group at the 5-position is presented. Furthermore, the site-selectivity analyses based on MO calculations of the 5-substituted 2(1H)-pyridones acting as the dienophiles are described.
Cross-Diels−Alder Reactions of 6-Oxo-1-Sulfonyl-1,6-Dihydropyridine-3-Carboxylates
作者:Marie-Laure Teyssot、Anh-Tuan Lormier、Isabelle Chataigner、Serge R. Piettre
DOI:10.1021/jo062186b
日期:2007.3.1
and suppression of the transformation of 1 into unreactive pyridines 3. Whereas the Coperearrangement from IED to NED occurs under thermal conditions, no evidence of its involvement underhighpressure could be detected. These and other data point to similar activation energies for the NED and IED processes under these conditions.