| Summary: | This thesis describes transition metal-catalyzed synthesis of nitrogen-containing compounds, including two parts.
In Part I, we have demonstrated an efficient palladium(II)-catalyzed oxidative Heck cross-coupling protocol which allows the synthesis of highly substituted enamides that are important synthetic intermediates with a broad utility in various applications, and also achieved the transformation of enamide to the corresponding β-amino acid derivative under the asymmetric hydrogenation conditions with high ee value and high yield.
In Part II, we developed an efficient and practical rhodium(III)-catalyzed intramolecular annulation of alkyne tethered hydroxamates for the synthesis of 3-hydroxyalkyl isoquinolones and 6-hydroxyalkyl-2-pyridones. This reaction features high reverse-regioselectivity, broad substrate scope, excellent functional group tolerance, and mild reaction conditions at low catalyst loading, and in particular use an internal oxidant strategy (using N-O as oxidizing directing group). Furthermore, a convenient total synthesis of (±) antofine, (±) septicine and (±) tylophorine and construction of rosettacin, involving Rh(III)-catalyzed C-H bond functionalization of alkyne tethered hydroxamates as the key step, was accomplished.
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