Method for preparing 2-methyl-3-phenyl benzil alcohol

A technology of phenyl benzyl alcohol and methyl biphenyl is applied in the field of preparation of 2-methyl-3-phenyl benzyl alcohol, can solve the problems of low activity, low process yield, low product content and the like, and achieves the yield High performance, good product purity and convenient process operation
CN1935761AInactive Publication Date: 2007-03-28荆和祥
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
荆和祥
Publication Date
2007-03-28
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention belongs to the technical field of chemical product preparing method, especially a 2-methyl-3-phenyl benzylalcohol preparing method, comprising the main steps of: 1) using 2, 6-dichlorotoluene to make one-step formatting reaction in tetrahydrofuran solvent and then reacting with benzene bromide under the action of catalyst to produce an intermediate 3-chloro-2-methylbiphenyl; 2) making the intermediate perform two-step formatting reaction in tetrahydrofuran solvent and then directly reacting with dimethylformamide to produce 2-methyl-3-phenyl benzaldehyde; 3) reducing 2-methyl-3-phenyl benzaldehyde with metal reducer to produce course 2-mehtyl-3-phenyl benylalcohol; and 4) refining the course product with methanol, alcohol, toluene, activated carbon, etc and obtaining the finished product. And it is convenient to operating, beneficial to large-scale industrialized production, produces fewer three wastes and has advantages of high product yield and good product purity.
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Description

technical field

[0001] The invention belongs to the technical field of preparation methods of chemical products, in particular to a preparation method of 2-methyl-3-phenylbenzyl alcohol. Background technique

[0002] The molecular formula of 2-methyl-3-phenylbenzyl alcohol is C 14 h 14 O, the molecular weight is 198, and the structural formula is:

[0003]

[0004] 2-Methyl-3-phenylbenzyl alcohol is a white crystal with a special smell of alcohol. Soluble in toluene, methanol, ethyl acetate, acetone and other organic solvents, insoluble in water. This product is mainly used in the production of the pesticide bifenthrin and the synthesis of other pharmaceutical products.

[0005] The preparation method of existing 2-methyl-3-phenylbenzyl alcohol has: take 2,6-dichlorotoluene as raw material through two-step format reaction, prepare product with the direct reaction of formaldehyde gas, because chlorine atom and formaldehyde in the raw material The activity of the react...

Claims

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