“…at the same time, cleaved the acetate to give 8-amino-yhydroxy-4-methylcoumarin (47). Reduction under acidic con ditions resulted in the isolation of 54 rather than the desired 0-acetyl derivative(78).Inview of the experimental difficulties encountered in the synthesis of 7-acetoxy-8-amino-4-methylcoumarin, pro tection of the phenol with an ether group was attractive. 7-Methoxy-4-methyl-8-nitrocoumarin (pj) can be prepared in good yields from 4^ upon treatment with methyl iodide and potassium carbonate.…”