SU384807A1 - METHOD FOR PRODUCING ARYLMETHYLATED AROMATIC HYDROCARBONS - Google Patents

Description

one

This invention relates to a process for the preparation of arylmethylated organic compounds.

A known method of producing arylmethylated aromatic compounds by reacting aromatic hydrocarbons with aryl chloromethanes or bischloromethiaes in the presence of a catalyst is a complex compound of metal chlorides and ammonium tetrasubstituted salts.

However, it takes a long time to produce products according to a known method due to the low reaction rate.

In order to shorten the reaction time, it is proposed to use as a catalyst a complex compound of metal chlorides with tetra-substituted ammonium salts of the general formula M.eCU - R4-Cl-A, where at p 0.5-2 mol, or, where MeC1x A1C1z, PES, ZnCb or SnCU; R4 is tetraalkyl, trialkylaryl, dialkylaryl-H, aryl-3N.

Example 1. A mixture of an aromatic hydrocarbon, aryl chloromethane and a catalyst, taken in a molar ratio of 10: 1: 0.01; 10: 1: 0.05; 5: 1: 0.05; 2: 1: 0.05, heated under reflux at 100-110 ° С with absorption of released hydrogen chloride. The reaction time depends on the concentration of the catalyst.

At the end of the evolution of hydrogen chloride, the catalyst is deposited on the bottom of the reactor in the form of a viscous liquid, which, after separation from the reaction mixture, can be re-used by decantation. The reaction mixture is distilled, the unreacted starting materials and the reaction products are separated. The yield of the target product is 75-90%.

The process can be carried out continuously in a cascade of devices ideally 10 mix.

Example 2. A mixture of naphthalene, aryl chloromethane ((g, o, or lg xylyl chlorides or a mixture of xylyl chlorides obtained by chloromethylation of toluene) and catalyst, taken in a molar ratio of 5: 1: 0.05; 2: 1: 0.05, heated as in example 1, at 100-120 C. The reaction time is 0.5-2 hours.

Unreacted naphthalene is distilled off. The output of technical tolylnaphthylmethane 95-

96% According to 1.6370-1.6430 (depending on the starting xyllyl chloride).

Technical product can be applied in

as a plasticizer without additional

cleaning or distilling by distillation in a vacuum.

The yield of purified products up to 85% (from technical).

Example 3. The mixture of hydrocarbon AGN,

arylchloromethane ArCHjCl and the catalyst are heated and treated similarly to Examples 1 and 2 to produce hydrocarbons of the general formula AgCH2Ag, where Ar and Ar are aryl, the structure of which depends on the structure of the original aromatic hydrocarbon and arylchloromethane. The method can be applied to produce more complex hydrocarbons, starting from ClHoCA-CHaCl bischlormethylrepreps. Hydrocarbons are obtained as a mixture of isomers, which can be separated by conventional methods. The products and reaction conditions obtained in the examples are listed in the table. 5 10 15 b Subject of the invention A method for producing arylmethylated aromatic hydrocarbons by reacting aromatic hydrocarbons with arylchlorometaps or bischloromethanes in the presence of a catalyst based on a complex compound of metal chlorides, and tetrasubstituted ammonium salts, characterized in that, in order to shorten the reaction time, a complex catalyst of the general formula MeClx-R4-NC1-A, where A is pNCl1 and 0.5-2.0 mol, or MeCU, where MeClx A1Cl3, PeCl, ZnCb or SnCU; R4-tetraalkyl, trialkylaryl, dialkylamino-H, aryl-3N.