METHOD FOR PRODUCING 3-NITRO-2-(N-t-BUTOXYCARBONYL)- AMINOBENZOATES AND INTERMEDIATE FOR PRODUCING THE SAME ESTERS

摘要

PROBLEM TO BE SOLVED: To provide a producing method capable of industrially, inexpensively and readily producing 3-nitro-2-(N-t-butoxy)aminobenzoates and obtain 3- nitro-2-(N,N-di-t-butoxycarbonyl)aminobenzoates useful as intermediates for producing the above compounds. SOLUTION: This method for producing 3-nitro-2-(N-t-butoxycarbonyl) aminobenzoates is characterized by subjecting 3-Nitro-2-aminobenzoates to di-t-butoxycarbonylation to afford 3-nitro-2-(N,N-di-t-butoxycarbonyl) aminobenzoates and successively subjecting the resultant compound to de-mono-t- butoxycarbonylation.