Lewis acid-catalyzed Csp3–H functionalization of methyl azaarenes with α-trifluoromethyl carbonyl compounds
摘要:
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.
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