134284-55-2Relevant articles and documents
Formylation and dichloromethylation as alternative directions of rieche reaction. A novel to the synthesis of sterically hindered aromatic dialdhydes
Yakubov, Alexander P.,Tsyganov, Dmitry V.,Belen'kii, Leonid I.,Krayushkin, Mikhail M.
, p. 3397 - 3404 (2007/10/02)
A previously unknown direction of Rieche reaction has been found: formylation of mesitylene, m-xylene, and durene with dichloromethyl methyl ether in the presence of aluminium trichloride and, to lesser extent, of titanium tetrachloride give the respective benzylidene dichlorides besides aldehydes. A novel approach to the synthesis of sterically hindered aromatic dialdehydes has been offered which involves the transformation of a monoaldehyde into the corresponding benzylidene dichloride, Rieche formylation of the latter, and hydrolysis of dichloromethyl aldehyde formed.
NEW DATA ON THE FORMYLATION OF MESITYLENE AND DIMESITYLMETHANE BY DICHLOROMETHYL ETHER
Yakubov, A. P.,Tsyganov, D. V.,Belen'kii, L. I.,Krayushkin, M. M.
, p. 1707 - 1712 (2007/10/02)
During the formylation of mesitylene by the action of dichloromethyl methyl ether in the presence of aluminium chloride or titanium tetrachloride an appreciable amount of 2,4,6-trimethylbenzylidene chloride is formed.This indicates the possible appearance of the CHCl2+ cation as intermediate particle.The disubstituted products are formed in addition to the monosubstitution products.In addition to the corresponding dialdehyde, the formylation of dimesitylmethane leads to the formation of products which contain one benzene ring and appear during cleavage of thesubstrate and subsequent substitution (formylmesitylene, dichloromethylmesitylene, chloromethylmesitylenecarbaldehyde, chloromethyl-2,4,6-trimethylbenzylidene chloride).