PROCESS FOR PRODUCING BIS(4-HYDROXY-3-NITROPHENYL) COMPOUND

Title:

PROCESS FOR PRODUCING BIS(4-HYDROXY-3-NITROPHENYL) COMPOUND

Document Type and Number:

WIPO Patent Application WO/2001/081293

Kind Code:

A1

Abstract:

A process for producing a bis(4-hydroxy-3-nitrophenyl) compound, characterized in that a bis(4-hydroxyphenyl) compound comprising two phenyl groups bonded to each other directly or through an electron-donating bridging group, sulfoxide group, sulfone group, or carbonyl group is nitrated with nitric acid in an inert solvent substantially in the absence of any other acid. By the process, the target compound reduced in the content of trinitro-substituted compounds can be produced in high yield. Recrystallizing the compound easily gives in high yield a high-purity product suitable for use as a raw material for a heat-resistant polymer, etc., because the content of trinitro-substituted compounds in that compound is low.

Inventors:

TANAKA EIICHI (JP)
FUJIMOTO MASAKI (JP)

Application Number:

PCT/JP2001/003434

Publication Date:

November 01, 2001

Filing Date:

April 23, 2001

Export Citation:

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Assignee:

NIPPON KAYAKU KK (JP)
TANAKA EIICHI (JP)
FUJIMOTO MASAKI (JP)

International Classes:

C07C201/08; C07C205/22; C07C205/38; C07C315/04; C07C317/22; (IPC1-7): C07C201/08; C07C205/22; C07C315/04; C07C317/22; C07C319/20; C07C323/20

Foreign References:

JPH11106365A	1999-04-20
JPH06211752A	1994-08-02
EP0254990A1	1988-02-03

Other References: