132900-75-5 Usage
Preparation
The preparation of Benzoic acid, 4-[4-[(1-oxo-2-propenyl)oxy]butoxy]-, 2-Methyl-1,4-phenylene ester is as follows:2-methylhydroquinone 3.0 g (24.2 mmol), 4-[3-(acryloyloxy)butoxy]benzoic acid 14.7 g (55.6 mmol), 4-dimethylaminopyridine (DMAP) 0.18 g (1.5 mmol) ) And 0.14 g (1.4 mmol) of 35% hydrochloric acid were added to 39 mL of tetrahydrofuran (THF) and stirred, and 7.0 g (55.6 mmol) of N,N-diisopropylcarbodiimide (DIC) was added dropwise to the solution. After completion of dropping, the mixture was stirred at 40° C. for 5 hours to obtain a reaction solution. The reaction solution was filtered to remove insoluble matter. A part of the solvent of the filtrate from which the insoluble matter was removed was distilled off to obtain 15 mL of a solution. 60 mL of methanol was added dropwise to 15 mL of the obtained solution to crystallize the polymerizable liquid crystal compound, and then the mixture was stirred under cooling. The obtained precipitate (crystal) is collected by filtration, and the collected precipitate (crystal) is dried to give 2-methyl-1,4-phenylene=bis{4-[3-(acryloyloxy)butoxy]. Benzoate} was obtained with a yield of 94% (14.0 g, 22.8 mmol). The purity of the obtained 2-methyl-1,4-phenylene=bis{4-[3-(acryloyloxy)butoxy]benzoate} was 97.8%. In addition, the content of N,N-diisopropylurea as a by-product contained in the finally obtained 2-methyl-1,4-phenylene bis{4-[3-(acryloyloxy)butoxy]benzoate} , 0.01% by mass relative to the yield, which was sufficiently reduced.
Check Digit Verification of cas no
The CAS Registry Mumber 132900-75-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,2,9,0 and 0 respectively; the second part has 2 digits, 7 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 132900-75:
(8*1)+(7*3)+(6*2)+(5*9)+(4*0)+(3*0)+(2*7)+(1*5)=105
105 % 10 = 5
So 132900-75-5 is a valid CAS Registry Number.
132900-75-5Relevant articles and documents
Method of manufacturing a polymerizable liquid crystal compound
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Paragraph 0098-0106, (2020/07/21)
[Problem] high efficiency and safe method for producing high purity production by the polymerizable liquid crystal compound. [Solution] the aromatic hydroxy compound, a benzoic acid derivative compounds having a polymerizable group, in a reaction solvent, in the presence of a condensation agent by reaction, (a) a step of preparing a solution containing a polymerizable liquid crystal compound corresponding, to the polymerizable liquid crystal compound is produced, said condensation agent, N, characterized in N - diisopropyl, a polymerizable liquid crystal compound. [Drawing] no
A method of manufacturing a carboxylic acid halide
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Paragraph 0054; 0056, (2016/12/16)
PROBLEM TO BE SOLVED: To provide a method which can reduce a load on production facility due to acidic gas generated during reaction and can shorten reaction time in the production process of a carboxylic acid halide, and further can alleviate bad actions
