Title:
CAGE-SHAPED CYCLOBUTANOIC DIANHYDRIDES AND PROCESS FOR PRODUCTION THEREOF
Document Type and Number:
WIPO Patent Application WO/2006/043519
Kind Code:
A1
Abstract:
A process which comprises reacting a 1,2,3,4-cyclobutane- tetracarboxylic-1,2:3,4-dianhydride [1] with an alcohol [2] in the presence of an acid catalyst to obtain a compound [3], isomerizing the compound [3] with a base catalyst into a compound [4], reacting the compound [4] with an organic acid to obtain a compound [5], and reacting the compound [5] with a dehydrating agent to obtain a 1,2,3,4-cyclobutanetetracarboxylic-1,3:2,4 -dianhydride: wherein R1 and R2 are each independently hydrogen, halogeno, alkyl of 1 to 10 carbon atoms, halogenated alkyl of 1 to 10 carbon atoms, cycloalkyl of 3 to 8 carbon atoms, phenyl, or cyano; and R3 is alkyl of 1 to 10 carbon atoms.
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Inventors:
SUZUKI HIDEO (JP)
TAMURA TAKAYUKI (JP)
TAMURA TAKAYUKI (JP)
Application Number:
PCT/JP2005/019071
Publication Date:
April 27, 2006
Filing Date:
October 18, 2005
Export Citation:
Assignee:
NISSAN CHEMICAL IND LTD (JP)
SUZUKI HIDEO (JP)
TAMURA TAKAYUKI (JP)
SUZUKI HIDEO (JP)
TAMURA TAKAYUKI (JP)
International Classes:
C07C67/08; C07C51/09; C07C61/04; C07C67/11; C07C67/12; C07C67/333; C07C69/74; C07D493/08
Foreign References:
| JP2003073338A | 2003-03-12 | |||
| US3139395A | 1964-06-30 |
Other References:
CHEMICAL ABSTRACTS, Columbus, Ohio, US; GRIFFIN G W ET AL: "The chemistry of photodimers of maleic and fumaric acid derivatives. I. Dimethyl fumare dimer." XP008060419
CHEMICAL ABSTRACTS, vol. 1964, no. 61, Columbus, Ohio, US; GRIFFIN G W ET AL: "Reductive cleavage of tetrasubstituted cyclobutanes: posible examples of homolytic fragmentations." XP002995091
CHEMICAL ABSTRACTS, vol. 120, no. 216747, 1994, Columbus, Ohio, US; MAIER G ET AL: "Small rings. 77. Generation and trapping reactions of tetramethyl cyclobutadienetetracarboxylate." XP008060420
See also references of EP 1813592A4
CHEMICAL ABSTRACTS, vol. 1964, no. 61, Columbus, Ohio, US; GRIFFIN G W ET AL: "Reductive cleavage of tetrasubstituted cyclobutanes: posible examples of homolytic fragmentations." XP002995091
CHEMICAL ABSTRACTS, vol. 120, no. 216747, 1994, Columbus, Ohio, US; MAIER G ET AL: "Small rings. 77. Generation and trapping reactions of tetramethyl cyclobutadienetetracarboxylate." XP008060420
See also references of EP 1813592A4
Attorney, Agent or Firm:
Kojima, Takashi (16-12 Ginza 2-chom, Chuo-ku Tokyo 61, JP)
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