64248-62-0 Usage
Description
3,4-Difluorobenzonitrile is an organic compound characterized by the presence of two fluorine atoms at the 3rd and 4th positions on a benzene ring, with a nitrile group (C≡N) attached. This molecule is known for its unique chemical properties and reactivity, making it a valuable intermediate in the synthesis of various pharmaceuticals and agrochemicals.
Uses
Used in Agrochemical Industry:
3,4-Difluorobenzonitrile is used as a key intermediate in the synthesis of fluorophenoxy herbicides for its ability to impart specific herbicidal properties. The incorporation of fluorine atoms enhances the herbicide's effectiveness and selectivity, leading to improved weed control in agricultural settings.
Used in Pharmaceutical Industry:
3,4-Difluorobenzonitrile is utilized as a building block in the preparation of fluorine-substituted benzyl amides, which are important for the development of new pharmaceutical compounds. The presence of fluorine atoms can significantly influence the pharmacokinetics, potency, and selectivity of these compounds, making them more effective in treating various diseases and medical conditions.
Preparation
The preparation of?3,4-Difluorobenzonitrile is as follows:To the dry reactor was added 289.6 kg (1.843 kmoles) of 3,4-difluorobenzamide and 800 kg of dichloroethane solution, 241.2 kg (2.02 kmoles) of dichlorosulfoxide and catalyst DMF I.5 And the reaction was carried out at 50 ° C for 5 hours with stirring. After the reaction was complete, the reaction solution was poured into ice water with stirring and the mixture was separated to obtain a crude product having a qualitative content of 96% of 3,4-difluorobenzonitrile 259.1 kg (1.788 kmoles) in 97% yield. The crude product was distilled to give a qualitative content of 99% of 3,4,8-difluorobenzonitrile 248.6 kg (1.77 kmoles) and a distillation yield of 99%.
Check Digit Verification of cas no
The CAS Registry Mumber 64248-62-0 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 6,4,2,4 and 8 respectively; the second part has 2 digits, 6 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 64248-62:
(7*6)+(6*4)+(5*2)+(4*4)+(3*8)+(2*6)+(1*2)=130
130 % 10 = 0
So 64248-62-0 is a valid CAS Registry Number.
InChI:InChI=1/C7H3F2N/c8-6-2-1-5(4-10)3-7(6)9/h1-3H
64248-62-0Relevant articles and documents
One pot synthesis of aryl nitriles from aromatic aldehydes in a water environment
Chen, Qingqing,Han, Hongwei,Lin, Hongyan,Ma, Xiaopeng,Qi, Jinliang,Wang, Xiaoming,Yang, Yonghua,Zhou, Ziling
, p. 24232 - 24237 (2021/07/29)
In this study, we found a green method to obtain aryl nitriles from aromatic aldehyde in water. This simple process was modified from a conventional method. Compared with those approaches, we used water as the solvent instead of harmful chemical reagents. In this one-pot conversion, we got twenty-five aryl nitriles conveniently with pollution to the environment being minimized. Furthermore, we confirmed the reaction mechanism by capturing the intermediates, aldoximes.
3,4- Difluorobenzonitrile process production method (by machine translation)
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Paragraph 0034-0038, (2020/02/27)
The invention relates to the field, of compound production technologies, in particular to 3,4 - difluoro-benzonitrile, obtained by centrifugally separating :S1: by adding raw material :S2: and removing toluene :S3: from the catalyst :S4: to collect the crude 3,4 - difluoro-cyanobenzene.S5: The reaction rate :S6: can be effectively reduced by controlling the presence time 3,4 - of the reaction depth. difluorobenzonitrile, by controlling the reaction depth of the system. N - The method (89.0 - 89.5%), comprises the following steps) - 1,3 - and, effectively reducing the coking, phenomenon, of the system at a high, temperature. The product. yield, is effectively reduced (3,4 . (by machine translation)
A kind of boron-containing compounds and their use in catalytic fluorination reaction (by machine translation)
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Paragraph 0030-0033; 0046-0049, (2019/05/28)
The invention relates to the field of fine chemical engineering, in particular to boron-containing compounds and application thereof in catalytic fluorination reaction. The boron-containing compoundsprovided by the invention are used as a catalyst and can be fluorinated by further mild reaction. Compared with the prior art, the boron-containing compounds have the advantages of mild conditions andhigh efficiency of the fluorination reaction, novel catalysis principle, simplicity and convenience in operation, less pollution, low solvent cost and suitability for industrial production.
