Abstract
Hydroesterification of terminal alkynes with butanol proceeds smoothly and efficiently under a normal pressure of carbon monoxide by using a catalyst system of Pd(dba) 2/PPh 3/TsOH (dba=dibenzylideneacetone, TSOH = p-toluenesulfonic acid) to give the corresponding 2-substituted 2-propenoic acid butyl esters in good selectivity and yield. Internal alkynes can also be hydroesterified under similar conditions.
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