been developed for the oxidant‐ and base‐free dehydrogenativecoupling of N‐heterocycles at mild conditions. Under the action of an iridium catalyst, N‐heterocycles undergo multiple sp3 CH activation steps, generating a nucleophilic enamine that reacts in situ with various electrophiles to give highly functionalized products. The dehydrogenativecoupling can be cascaded with Friedel–Crafts addition
Iron-catalyzed C(sp3)–H functionalization of methyl azaarenes with α-oxoesters: a facile approach to lactic acid derivatives
作者:Kun Jiang、Danwei Pi、Haifeng Zhou、Sensheng Liu、Kun Zou
DOI:10.1016/j.tet.2014.02.069
日期:2014.5
A highly efficient method for the C(sp(3))-H functionalization of methyl azaarenes to alpha-oxoesters in the presence of iron(II) acetate as an inexpensive, nontoxic catalyst with moderate-to-excellent yields has been developed. This transformation represents a facile approach to medicinally important lactic acid derivatives. (C) 2014 Elsevier Ltd. All rights reserved.
Lewis acid-catalyzed Csp3–H functionalization of methyl azaarenes with α-trifluoromethyl carbonyl compounds
作者:Vincent B. Graves、Abid Shaikh
DOI:10.1016/j.tetlet.2012.12.013
日期:2013.2
A Lewis acid promoted Csp(3)-H bond functionalization of methyl azaarenes with alpha-trifluoromethylated carbonyl compounds is described. Catalytic amounts of Yb(OTf)(3) provided a straightforward access to the corresponding trifluoromethylated alcohols in excellent yields up to 94% under mild reaction conditions. Published by Elsevier Ltd.