New Heteroannulation Reactions of <i>N</i>-Alkoxybenzamides by Pd(II) Catalyzed C–H Activation
作者:Joe W. Wrigglesworth、Brian Cox、Guy C. Lloyd-Jones、Kevin I. Booker-Milburn
DOI:10.1021/ol202187h
日期:2011.10.7
through a highly efficient and E-selective C–H activation/Heck/Aza-Wacker sequence. Substoichiometric amounts of benzoquinone can be employed in a cooperative oxidation system with O2, leading to facile purification of products. Modification of the reaction conditions provides a generalroute to substituted phthalimides by carbonylation with CO. Both systems were found to tolerate a wide range of functionality
Photochemistry of Sulfilimine-Based Nitrene Precursors: Generation of Both Singlet and Triplet Benzoylnitrene
作者:Vasumathi Desikan、Yonglin Liu、John P. Toscano、William S. Jenks
DOI:10.1021/jo071049r
日期:2007.8.31
N-benzoyl-S,S-diphenylsulfilimine or N-benzoyl dibenzothiophene sulfilimine produces PhNCO and also benzoylnitrene. Direct observation of the triplet nitrene, energetic differences between the singlet and triplet state of the nitrene, and oxygen quenching experiments suggest that the triplet nitrene derives from the triplet excited state of the sulfilimine precursors, rather than through equilibration of nearby
A copper-catalyzed cross-dehydrogenative coupling reaction that involves CâH activation of formamides and NâH activation of N-alkoxy amides has been developed. This protocol affords a novel approach to the synthesis of multisubstituted ureas under mild conditions.
Stereospecific Suzuki, Sonogashira, and Negishi Coupling Reactions of <i>N</i>-Alkoxyimidoyl Iodides and Bromides
作者:Debra D. Dolliver、Bijay T. Bhattarai、Arjun Pandey、Megan L. Lanier、Amber S. Bordelon、Sarju Adhikari、Jordan A. Dinser、Patrick F. Flowers、Veronica S. Wills、Caroline L. Schneider、Kevin H. Shaughnessy、Jane N. Moore、Steven M. Raders、Timothy S. Snowden、Artie S. McKim、Frank R. Fronczek
DOI:10.1021/jo400179u
日期:2013.4.19
N-alkoxyimidoyl iodides is described. This reaction occurs with complete retention of the imidoyl halide geometry to give single E- or Z-isomers of diaryl oxime ethers. The Sonogashira coupling of N-alkoxyimidoyl iodides and bromides with a wide variety of terminal alkynes to afford single geometric isomers of aryl alkynyl oxime ethers has also been developed. Several of these reactions proceed through
Organocatalytic Oxidative Annulation of Benzamide Derivatives with Alkynes
作者:Srimanta Manna、Andrey P. Antonchick
DOI:10.1002/anie.201404222
日期:2014.7.7
Organocatalytic annulation by functionalization of benzamide derivatives with alkynes has been developed. We report a new approach of cycloaddition under mild reaction conditions using simple catalysts, such as iodobenzene and peracetic acid, as oxidant. Those novel, mild reaction conditions provided a straightforward synthesis of isoquinolones with fast reaction rate. Notable selectivity in annulation of unsymmetrically