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EP0176085A2
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EP
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4-Substituted-1,2,3,6-tetrahydrophthalic acid anhydride and production process thereof
Assignee: Nissan Chemical Corp
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Filing: 1985-09-24
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Granted: —
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Expires: 2005-09-24
Abstract
Abstract A novel 4-substituted-1,2,3,6-tetrahydrophthalic acid anhydride represented by the structural formula (I): where R', R 2 , R 3 each represents one element selected from the group consisting of a halogen atom, a lower alkyl and a lower alkoxy group and R', R 2 and R 3 may be identical with or different from each other, excepting the case where R', R 2 and R 3 are lower alkyl groups simultaneously and a process for producing the same. The novel compound is useful as coupling agents, plasticizers, curing agents, etc.
Inventors
- 👤 Fumie Sato
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-08 18:19
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/54; C07; C07F; C07F7/00; C07F7/02; C07F7/08; C07F7/12; C07F7/18; C07F7/1804
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
75 words
(1) A 4-substituted-1,2,3,6-tetrahydrophthalic acid anhydride represented by the structural formula [I]: where R 1 , R 2 , R each represents one element selected from the group consisting of a halogen atom, a lower alkyl and a lower alkoxy group and R 1 , R 2 and R 3 may be identical with or different from each other, excepting the case where R 1 , R 2 and R 3 are lower alkyl groups simultaneously.
Claim 2
Dependent Claim
53 words
(2) The 4-substituted-1,2,3,6-tetrahydrophthalic acid anhydride as defined in claim 1, which is a 4-(lower alkoxy)silyl-1,2,3,6-tetrahydrophthalic acid anhydride where R 1 , R 2 and R 3 in the above-mentioned structural formula [I] are lower alkyl groups and which is represented by the following structural formula [I-a]: where R represents a lower alkyl group.
Claim 3
Dependent Claim
110 words
(3) A process for producing a 4-substituted-1,2,3,6-tetrahydrophthalic acid anhydride represented by the general formula [I]: where R l , R 2 , R each represents one element selected from the group consisting of a halogen atom, a lower alkyl and a lower alkoxy group and R 1 , R 2 and R 3 may be identical with or different from each other, excepting the case where R 1 9 R 2 and R 3 are lower alkyl groups simultaneously, wherein a 2-substituted-1,3-butadiene represented by the structural formula [II]: where R 1 , R 2 , R 3 have the same meanings as described above, is reacted with maleic acid anhydride.
Claim 4
Dependent Claim
82 words
(4) The process for producing the 4-substituted-1,2,3,6-tetrahydrophthalic acid anhydride as defined in claim 1, wherein 2-(lower trialkoxy)silyl-1,3-butadiene, wherein R 1 , R 2 , R 3 in the structural formula [II] as described above are lower alkyl groups and represented by the following structural formula [II-a]: where R represents a lower alkyl groups, is reacted with maleic acid anhydride to form a 4-(lower alkoxy)silyl-1,2,3,6-tetrahydrophthalic acid anhydride represented by the following structural formula [I-a]: where R has the same meaning as described above.
References Cited (Backward Citations)
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