95-75-0Relevant articles and documents
Synthesis technology of 2,4-dichlorotoluene
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Paragraph 0011; 0012; 0013; 0014; 0015; 0016; 0017-0028, (2017/04/25)
The invention relates to a synthesis technology of 2,4-dichlorotoluene. The synthesis technology comprises the following steps of 1 production of a chlorination catalyst, wherein an L-type molecular sieve serves as a carrier to be put into a ferric chloride solution, an aluminum chloride solution and a titanium chloride solution to be mixed, then the L-type molecular sieve is put into a zinc chloride solution and a aluminum chloride solution to be mixed, the mixture is dried, and the chlorination catalyst can be prepared; 2 chlorination of p-chlorotoluene, wherein p-chlorotoluene is added into a reaction kettle, the chlorination catalyst is added into the reaction kettle, chlorine is introduced into the reaction kettle for a reaction, and an alkaline solution is added into a generated mixture for a reaction; 3 component separation, wherein a mixture generated in the step 2 is fed into a rectifying tower for four times of rectifying, and then 2,4-dichlorotoluene can be obtained. According to the synthesis technology, the effect of the chlorination catalyst is effectively improved, the reaction speed and the reaction yield are effectively increased, the selectivity of 2,4-dichlorotoluene is effectively promoted, generation of by-products is inhibited, and the yield of 2,4-dichlorotoluene is increased.
N-Tosylhydrazine-mediated deoxygenative hydrogenation of aldehydes and ketones catalyzed by Pd/C
Zhou, Lei,Liu, Zhenxing,Liu, Yizhou,Zhang, Yan,Wang, Jianbo
, p. 6083 - 6087 (2013/07/25)
A mild and efficient method for the deoxygenative hydrogenation of aldehydes and ketones has been developed. The reaction is mediated by N-tosylhydrazine with H2 (1 atm) as the reductant and 10% Pd/C as the catalyst.
Process for preparing 4, 5-dichloro-2-methylbenzoic acid
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, (2008/06/13)
The present invention relates to a process for preparing 4,5-dichloro-2-methylbenzoic acid and also its salts in high yields and in high purities by reacting 3,4-dichlorotoluene with acetyl chloride or chloroacetyl chloride in the presence of a Friedel-Crafts catalyst and subsequently oxidizing the acetylated intermediate to give the carboxylic acid.