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Title:
脂環式スピロ酸二無水物の製造法
Document Type and Number:
Japanese Patent JP4328938
Kind Code:
B2
Abstract:

To provide an alicyclic tetracarboxylic dianhydride which can be used as a starting monomer of a polyimide having a high light transmittance without absorption in the ultraviolet region and having improved processability and excellent solubility in solvents.

The invention relates to 4-oxatetracyclo[5.4.0.02,6.18,11]dodecane-3,5-dione-9-spiro-3'-(tetrahydrofuran-2',5'-dione) represented by formula (1), tricyclo[4.2.1.02,5]nonane compounds represented by formulas (2) and (3) as intermediates thereof, and methods for producing them. In formulas (1), (2) and (3), a carbon-carbon bond including a broken line represents a single or a double bond; and each R1independently represents H or a 1-10 C alkyl.

COPYRIGHT: (C)2004,JPO


Inventors:
Hideo Suzuki
Application Number:
JP2002173488A
Publication Date:
September 09, 2009
Filing Date:
June 14, 2002
Export Citation:
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Assignee:
Nissan Chemical Industry Co., Ltd.
International Classes:
C07D307/94; C07D493/10; C07B61/00; C07C51/09; C08G59/42; C08G73/10; C07C61/135; C07C61/29
Domestic Patent References:
JP10310640A
JP2003137843A
JP9249613A
JP9077721A
JP9291065A
Foreign References:
US3423431



 
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