Add time:07/15/2019         Source:sciencedirect.com

An efficient, mild, cost effective and practical method is presented for generation of esters (RCO2R′) from acids (RCO2H)/ 2-oxoacids (RCOCO2H)/ 2-oxoaldehydes (RCOCHO)/ 2-oxoesters (RCOCO2R″) and alcohols by using oxone as catalyst. In addition to deciphering the scope of our process, we propose a mechanism for esterification through a common intermediate IV. Reaction with 2-oxoacids and 2-oxoaldehydes proceed with initial CO–C cleavage followed by oxone mediated esterification with alcohols. In addition, reaction with 2-oxoesters proceeds through CO–CO bond cleavage and trans-esterification.

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