Synthesis and structural characterization of isomeric coumarino‐1,2‐oxaphosphole derivatives |
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Authors: | Petar J Petrov Alexi A Alexiev Galin Petrov Gianluca Giorgi |
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Abstract: | The coumarino‐3,4‐c]‐3H‐10‐methyl‐2‐oxo‐2‐phenyl‐1,2‐oxaphosphole was prepared by the addition of PhPCl2 to 3‐acetylcoumarin in the presence of acetic anhydride. Its conversion to the isomeric coumarino‐3,4‐c]‐9H‐9‐methyl‐2‐oxo‐2‐phenyl‐1,2‐oxaphosphole was studied in different reaction conditions. The structures of the two isomers were determined by X‐ray crystallography and by ab initio molecular orbital calculations. |
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