118-45-6 Usage
Description
4-Chlorophthalic anhydride is an organic compound that serves as a crucial monomer in the synthesis of polyimide. It is known for its exceptional tolerance, shape, and chemical stability, making it a valuable material in various industries.
Uses
Used in Aviation and Aerospace Industry:
4-Chlorophthalic anhydride is used as a key component in the production of polyimide, which is known for its outstanding strength, wear resistance, and ability to withstand extreme temperatures. This makes it an ideal material for applications in the aviation and aerospace industries.
Used in Microelectronics Industry:
4-Chlorophthalic anhydride is used as a monomer in the synthesis of polyimide, which is highly valued in the microelectronics industry due to its excellent chemical and thermal stability, making it suitable for various applications in this field.
Used in High-Technology Field:
4-Chlorophthalic anhydride is used as a monomer for the production of polyimide, which has found widespread use in high-technology fields due to its exceptional properties, such as its ability to withstand extreme temperatures and its excellent wear resistance.
Used in Synthesis of Engineering Plastics:
4-Chlorophthalic anhydride is used as a monomer in the synthesis of diphenyl ether dianhydride, two single and two double ether, thioether dianhydride, and a series of polyimide engineering plastics with excellent performance.
Used in Pharmaceutical and Pesticide Industry:
4-Chlorophthalic anhydride is not only an ideal raw material for the synthesis of various polyimide intermediates but can also be utilized in the development of drugs and pesticides.
Synthesis Reference(s)
Tetrahedron Letters, 23, p. 371, 1982 DOI: 10.1016/S0040-4039(00)86833-1
Check Digit Verification of cas no
The CAS Registry Mumber 118-45-6 includes 6 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 3 digits, 1,1 and 8 respectively; the second part has 2 digits, 4 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 118-45:
(5*1)+(4*1)+(3*8)+(2*4)+(1*5)=46
46 % 10 = 6
So 118-45-6 is a valid CAS Registry Number.
InChI:InChI=1/C8H3ClO3/c9-4-1-2-5-6(3-4)8(11)12-7(5)10/h1-3H
118-45-6Relevant articles and documents
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Weiler-Feilchenfeld,H.,Solomonovici,A.
, p. 869 - 871 (1971)
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Preparation method, preparation device and intermediate of 4 -chlorophthalic anhydride
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Paragraph 0084; 0100-0108; 0115-0117; 0124-0126; 0133; ..., (2021/10/27)
The invention discloses a preparation method of 4 -chlorophthalic anhydride, a preparation device and an intermediate. The preparation method comprises the following steps: 2, 3 - dichloro maleic anhydride and 2 - chlorine -1, 3 - butadiene takes place cyclization reaction to obtain 1, 2 and 4 - trichloroacetic anhydride. Reaction of the 1, 2 and 4 - trichloroalternative dihydrophthalic anhydride in the removal HCl results in 4 -chlorophthalic anhydride. The chlorination reaction of maleic anhydride and thionyl chloride under the conditions of pyridine catalysts gives the 2, 3 -dichloromaleic anhydride. By adopting 2, 3 -dichloromaleic anhydride and 2 - chlorine -1, 3 - butadiene takes place D-A cyclization reaction, HCl-chlorophthalic anhydride is synthesized with high selectivity, and the 4 - 4 -chlorophthalic anhydride process disclosed by the invention realizes continuous production.
PROCESS FOR THE PREPARATION OF ORGANIC HALIDES
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Paragraph 00146, (2017/08/01)
The present invention provides a halo-de-carboxylation process for the preparation of organic chlorides, organic bromides and mixtures thereof, from their corresponding carboxylic acids, using a chlorinating agent selected from trichloroisocyanuric acid (TCCA), dichloroisocyanuric acid (DCCA), or combination thereof, and a brominating agent.
ALLOSTERIC PROTEIN KINASE MODULATORS
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Page/Page column 45, (2012/03/10)
The invention provides specific small molecule compounds that allosterically regulate the activity or modulate protein-protein interactions of AGC protein kinases and the Aurora family of protein kinases, methods for their production, pharmaceutical compositions comprising same, and their use for preparing medicaments for the treatment and prevention of diseases related to abnormal activities of AGC protein kinases or of protein kinases of the Aurora family.