反应详情

A solution of 2-[2-methoxy-3-(2-chlorophenoxy)phenyl]valeric acid (3.8 g) in acetic anhydride (10 ml) and hydriodic acid (55-58%, 20 ml) were treated in a similar manner to that of Example 14-(8) to give 3-n-propyl-7-(2-chlorophenoxy)-2,3-dihydrobenzofuran-2-one (1.5 g). mp 51°-53° C.