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A Pd‐catalyzed asymmetric aromative [4+3]‐cyclization reaction of amino‐trimethylenemethanes (TMM, 1,3‐dipoles) with fused 1‐azadienes has been developed. This method enables access to the synthetically importance and biologically active benzofuran fused azepines and indeno‐azepines in excellent efficiency and stereoselectivity (up to 95% yield, 99% ee, >19 : 1 dr).
The use of organic catalysis AcrH2 enables the direct β‐trifluoromethylation of carbonyl compounds by atom transfer radical addition reactions with broad substrate scopes under mild conditions. This operationally simple and robust protocol successfully converts a variety of β‐chloro carbonyl compounds into the corresponding α‐chloro‐β‐fluoroalkylcarbonyl products. A significant advantage of this method...
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