Title:
ISOMERIZATION OF AROMATIC GROUP-CONTAINING NORBORNENE COMPOUND END ISOMER TO EXO ISOMER, MIXTURE OF AROMATIC GROUP-CONTAINING NORBORNENE COMPOUND ISOMERS AND ITS PRODUCTION
Document Type and Number:
Japanese Patent JP3128786
Kind Code:
B2
Abstract:
PURPOSE: To produce an isomer mixture capable of giving a copolymer having excellent heat-resistance and mechanical strength when copolymerized with ethylene by contacting an endo isomer in a mixture of aromatic group-containing norbornene compound isomers with a solid acid catalyst, thereby isomerizing the endo isomer to exo isomer.
CONSTITUTION: An endo isomer of formula II (X1 is group of formula III) of a compound of formula I [(p) is 0 or integer of ≥1; (q) and (r) are 0-2; R1 to R15 are H, halogen, aliphatic, alicyclic or aromatic hydrocarbon group or alkoxy; R5 (or R6) and R9 (or R7) may be bonded with each other directly or interposing a 1-3C alkylene] is made to contact with a solid acid catalyst (e.g. an acidic metal oxide) at -5 to +150°C (preferably 0-50°C) to isomerize the endo isomer to an exo isomer expressed by formula IV. When an isomer mixture of the compound of formula I containing ≥85mol% of the endo isomer is made to contact with a solid acid catalyst, the endo/exo molar ratio can be changed to 80/20 to 0/100.
Inventors:
Toshihiro Aine
Yoichiro Tsuji
Yoshihisa Toda
Yoichiro Tsuji
Yoshihisa Toda
Application Number:
JP2386092A
Publication Date:
January 29, 2001
Filing Date:
February 10, 1992
Export Citation:
Assignee:
Mitsui Chemicals, Inc.
International Classes:
B01J21/12; B01J27/04; B01J27/10; C07B61/00; C07C5/22; C07C13/42; C07C13/62; C07C13/64; C07C13/68; C07C23/30; C07C23/46; C07C25/22; (IPC1-7): C07C5/22; B01J21/12; B01J27/04; B01J27/10; C07C13/42; C07C13/64
Domestic Patent References:
| JP5572122A |
Attorney, Agent or Firm:
Shunichiro Suzuki