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β-Keto carboxylic acids are known to decarboxylate readily. In our pursuit to synthesize β-indolinyl propiophenones, we have exploited this chemistry as a mean of establishing a traceless handle. 2-Aroyl acrylic acids have been esterified to a trityl resin, after which Michael-type addition of indolines have been performed. Upon cleavage, the products are decarboxylated, and the β-indolinyl propiophenones...
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