Process for the preparation of amino-1,3-benzenediol

Details Process for the preparation of amino-1,3-benzenediol Process for the preparation of amino-1,3-benzenediol

C - Chemistry, Metallurgy

07

C

260/598, 260/601

C07C 205/23 (2006.01) C07C 205/43 (2006.01) C07C 215/80 (2006.01)

Patent

CA 1318916

64693-4280 ABSTRACT High purity nitro-1,3-benzenediols and amino- -1,3-benzenediols are prepared by (a) contacting a 1,3-bis(alkylcarbonato)benzene with a nitrating agent under reaction conditions such that a 1,3-bis(alkyl- carbonato)nitrobenzene is formed, (b) contacting the 1,3-bis(alkylcarbonato)nitrobenzene with a hydrolyzing agent under conditions such that a nitro-1,3-benzenediol is produced, and optionally (c) contacting the nitro- -1,3-benzenediol with a reducing agent under conditions such that an amino-1,3-benzenediol is produced. Bis(alkylcarbonato)nitrobenzene intermediates are also claimed. Of the amino-1,3-benzenediols, 4,6-diamino- -1,3-benzenediol is particularly useful in the preparation of high molecular weight polybenzoxazoles. 35,117-F

580358

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