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ORGANIC LETTERS
卷 15, 期 12, 页码 3150-3153出版社
AMER CHEMICAL SOC
DOI: 10.1021/ol4013712
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-
资金
- Natural Science and Engineering Research Council of Canada (NSERC)
A mild copper-catalyzed Chan-Lam-Evans type cross-coupling reaction for the regioselective and stereospecific preparation of (E)- or (Z)-enol esters is described. The method couples carboxylate salts or carboxylic acids with potassium alkenyltrifluoroborate salts In the presence of catalytic CuBr and DMAP with 4 angstrom molecular sieves under O-2 at 60 degrees C. Overall, this method demonstrates carboxylic acids as suitable reaction partners for nondecarboxylative copper-catalyzed cross-couplings to form C-O bonds in an Ullmann-like reaction.
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