Abstract
We report a method to produce amido esters and amido phosphonates. Octacarbonyldicobalt [Co2(CO)8] was found to be an efficient nongaseous CO source that could be used as a reagent for the carbonylation of diazo esters and diazo phosphonates under mild reaction conditions. A number of diazo esters and diazo phosphonates smoothly underwent the reaction with CO, which was generated from Co2(CO)8, to produce the corresponding ketenes. The subsequent reaction with an amine afforded the expected amido esters and phosphonates. By applying the developed protocol, we synthesized a number of amido esters and amido phosphonates. Characterization of these compounds was achieved by using standard spectroscopic and analytical techniques as well as crystal structure analysis for four of the products.
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