The palladium-catalyzedoxidative C–H olefination of uracils or caffeines with alkenes using an atmospheric pressure of molecularoxygen as the sole oxidant has been disclosed. This novel strategy offers an efficient and environmentally friendly method to biologically important C5-alkene uracil derivatives or C8-alkene caffeine derivatives.
Dehydrogenative alkenylation of uracils via palladium-catalyzed regioselective C–H activation
作者:Yi-Yun Yu、Gunda I. Georg
DOI:10.1039/c3cc41130c
日期:——
A regioselective Pd-catalyzed cross-dehydrogenativecoupling between uracils and alkenes is reported. This protocol provides easy access to a variety of 5-alkenyluracil structural motifs.
Correction to “Photoinduced Regioselective Olefination of Arenes at Proximal and Distal Sites”
作者:Argha Saha、Srimanta Guin、Wajid Ali、Trisha Bhattacharya、Sheuli Sasmal、Nupur Goswami、Gaurav Prakash、Soumya Kumar Sinha、Hediyala B. Chandrashekar、Sanjib Panda、S. S. Anjana、Debabrata Maiti
DOI:10.1021/jacs.2c04257
日期:2022.5.25
Supporting Information. The authors wish to correct an inadvertent error in connection with the spectra provided for compound 36. The revised Supporting Information is included with this correction. The revised data does not alter the conclusions of the published work. The Supporting Information is available free of charge at https://pubs.acs.org/doi/10.1021/jacs.2c04257. Experimental procedures and
Photoinduced Regioselective Olefination of Arenes at Proximal and Distal Sites
作者:Argha Saha、Srimanta Guin、Wajid Ali、Trisha Bhattacharya、Sheuli Sasmal、Nupur Goswami、Gaurav Prakash、Soumya Kumar Sinha、Hediyala B. Chandrashekar、Sanjib Panda、S. S. Anjana、Debabrata Maiti
DOI:10.1021/jacs.1c12311
日期:2022.2.2
regioselectivity. Often, the high thermal energy required to promote olefination leads to multiple site functionalizations. To this aim, we established a photoredox catalytic system constituting a merger of palladium/organo-photocatalyst (PC) that forges oxidative olefination in an explicit regioselective fashion with diverse arenes and heteroarenes. Visible light plays a significant role in executing “regioresolved”