Asymmetric Epoxidation Catalyzed by Chiral Ketones. In: Ma S, editor. Asymmetric Catalysis from a Chinese Perspective. Berlin: Springer Berlin Heidelberg; 2011. pp. 123-52. [DOI: 10.1007/978-3-642-19472-6_5]

Nickel-Catalyzed Cross-Coupling of Alkyl Carboxylic Acid Derivatives with Pyridinium Salts via C-N Bond Cleavage

The electrophile-electrophile cross-coupling of carboxylic acid derivatives and alkylpyridinium salts via C-N bond cleavage is developed. The method is distinguished by its simplicity and steers us through a variety of functionalized ketones in good to excellent yields. Besides acid chlorides, carboxylic acids were also employed as acylating agents, which enabled us to incorporate acid-sensitive functional groups such as MOM, BOC, and acetal. Control experiments with TEMPO revealed a radical pathway.