An unprecedented reductive dimerization of two carboxylic acids to produce ester derivatives by a combination catalyst involving InBr3 and sulfuric acid is described. A sequential conversion of the in‐situ formed ester to a symmetrical ether by indium‐catalyzed deoxygenation of the ester with a hydrosilane in the same pot was also demonstrated.
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Sakai et al. (2011) studied this question.
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