32707-89-4Relevant articles and documents
Preparation process of high-purity 3,5-bis(trifluoromethyl)benzyl alcohol
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, (2021/08/07)
The invention discloses a preparation method of high-purity 3,5-bis(trifluoromethyl)benzyl alcohol, and belongs to the technical field of organic synthesis. The method comprises the steps: reacting a Grignard reagent generated by reaction of 3,5-bis(trifluoromethyl)bromobenzene and magnesium metal with a reagent capable of introducing an aldehyde group to obtain 3,5-bis(trifluoromethyl)benzaldehyde, and then reducing 3,5-bis(trifluoromethyl)benzaldehyde into 3,5-bis(trifluoromethyl)benzyl alcohol through sodium borohydride. The purity of the product obtained by the technical route is more than 99.5%, the maximum single impurity is not more than 0.1%, and the requirement on high-purity 3,5-bis(trifluoromethyl)benzyl alcohol in the market is met. Raw materials required by the process are easy to obtain, reaction conditions are mild, safety is high, production cost is low, and the method is suitable for industrialization.
Palladium-catalyzed arylation of aldehydes with bromo-substituted 1,3-diaryl-imidazoline carbene ligand
Yamamoto, Tetsuya,Furusawa, Takuma,Zhumagazin, Azamat,Yamakawa, Tetsu,Oe, Yohei,Ohta, Tetsuo
, p. 19 - 26 (2015/02/19)
The combination of 0 valent palladium precursor and bromo-substituted 1,3-diaryl-imidazoline carbene ligand precursor such as 1-(2-bromophenyl)-3-(2,6-diisopropylphenyl)-imidazolinium chloride 1a exhibited high catalytic activity for the 1,2-addition of arylboronic acids to aldehydes including aqueous formaldehyde.
HIGH-PURITY (FLUOROALKYL)BENZENE DERIVATIVE AND PROCESS FOR PRODUCING THE SAME
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Page 16, (2010/02/10)
The process for producing a (fluoroalkyl)benzene derivative according to the present invention comprises a step of reducing the total content of group 3 to group 12 transition metals in an alkylbenzene derivative to 500 ppm or less in terms of metal atoms; a step of halogenating the branched alkyl group of the purified alkylbenzene derivative by a photohalogenation to obtain a (haloalkyl)benzene derivative; and a step of subjecting the (haloalkyl)benzene derivative to a halogen-fluorine exchange using HF in an amount of 10 mol or higher per one mole of the (haloalkyl)benzene derivative. The (fluoroalkyl)benzene derivative produced by the process is reduced in the content of impurities such as residual halogens and residual metals, and is useful as intermediates for functional chemical products for use in applications such as medicines and electronic materials.