The first cobalt-catalyzed amide activation of N-Boc-amides, and their conversion into esters, is reported here. This new methodology presents a very practical process that does not require an inert atmosphere, uses an inexpensive cobalt catalyst, and proceeds under mild reaction conditions. This catalytic system has a broad substrate scope and has been shown to be highly efficient, with catalyst loadings
Efficient synthesis of esters through oxone-catalyzed dehydrogenation of carboxylic acids and alcohols
作者:Fei Hou、Xi-Cun Wang、Zheng-Jun Quan
DOI:10.1039/c8ob02539h
日期:——
Since esters are important organic synthesis intermediates, an environmentally friendly oxone catalyzed-esterification of carboxylic acids with alcohols has been developed. A series of carboxylic acidesters are obtained in high yield. This strategy requires mild reaction conditions, providing an attractive alternative for the construction of valuable carbonyl esters. Electron-rich and electron-deficient
Iron-catalyzed C C bond activation/C O bond formation: Direct conversion of ketones to esters
作者:Ashot V. Arzumanyan
DOI:10.1016/j.tetlet.2017.10.068
日期:2017.12
iron-catalyzed oxidative activation of the (O)CC bond in ketones has been developed. This method enables direct synthesis of esters by the reaction between ketones and alcohols via conversion of the (O)CC bond to the (O)CO bond. The reaction runs selectively: the (O)CCAlkyl bond is activated, while the (O)CCAryl bond remains intact (i.e., iron-catalyzed intermolecular anti-Baeyer-Villiger activation of the (O)CC