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A simple synthesis of 2(3H)-benzoxazolones using phenyl chloroformate: A simple synthesis of 2(3H)-benzoxazolones using phenyl chloroformate. Maleski, Robert J.; Osborne, C. Edward; Cline, Sharon M. (Org. Chem. Div.Some commonly used reagents like 603-85-0 and 99-57-0 are used in this experiment., Tennessee Eastman Co., Kingsport, TN 37662-5231, USA). J. Heterocycl. Chem., 28(8), 1937-9 (English) 1991. CODEN: JHTCAD. ISSN: 0022-152X. DOCUMENT TYPE: Journal CA Section: 28 (Heterocyclic Compounds (More Than One Hetero Atom)) 2(3H)-Benzoxazolones I (R1 = R2 = H, R3 = H, Me, OMe; R1 = R3 = H, R2 = Me, NO2; R1 = NO2, R2 = R3 = H; R1 = R3 = H, R2 = CO2Et) were prepd. directly from the corresponding 2-aminophenols and Ph chloroformate in 66-83% yield. The intermediate 2-hydroxyphenylcarbamates are formed easily in aq. alc. solvent and these are converted rapidly to product, without their isolation, using one equiv. of NaOH. The synthesis accommodates a wide variety of substituents, including the easily hydrolyzed Et ester. .