SELECTIVE PRODUCTION OF ALICYCLIC POLYVALENT ACID HALIDE DIASTEREOMER AND NEW ALICYCLIC POLYVALENT ACID HALIDE CYCLOPENTANE-1,2,4-TRICARBONYL CHLORIDE OBTAINABLE THEREBY

Japanese Patent JP3103203

B2

PURPOSE: To highly easily obtain in high purity and yield the trans modification especially useful among alicyclic polyvalent acid halide diastereomers.
CONSTITUTION: (A) An alicyclic polyfunctional carboxylic acid is made to react at 0-120°C pref. 20-80°C with (B) a halogenating agent, a compound obtained from (1) an element capable of making a covalent bond with a halogen among the elements in the third period of the Periodic Table (e.g. Si, P, S), (2) oxygen and (3) a halogen (pref. thionyl halide, phosphoryl halide or sulfuryl halide) to selectively halogenate only the trans modification among the compound A followed by separating the resultant halogenated trans modification from the cis modification of the alicyclic polyfunctional carboxylic acid unreacted and acid anhydride, etc. Use of the trans modification thus obtained as a material for producing high polymers facilitates controlling the thermal, physical or chemical properties of the polymers within a specified range. With the present method, cyclopentane-1α, 2α, 4β-tricarbonyl chloride of formula I or cyclopentane-1α, 2α, 4α-tricarbonyl chloride, each new compound useful for producing separation membranes, can be obtained.

Mitsuru Shimizu
Hisao Hachisuka
Masahiko Hirose
Yasuo Kihara
Masatoshi Maeda
Yutaka Nakazono
Katsuhide Kojima
Ei Ikebata
Kenji Matsumoto

JP17167992A

October 30, 2000

June 04, 1992

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NITTO DENKO CORPORATION

C07B61/00; C07C51/60; C07C61/06; C07C61/15; (IPC1-7): C07C51/60; C07C61/15

JP6205952A
JP5201918A
JP58110538A

Yoshihiro Kiyohara

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