Etayo, Pablo et al. published new experimental results with the assistance of cas: 2235-01-0

For example, the most common synthesis of ethers involves the attack of an alkoxide ion on an alkyl halide. This method is called Williamson ether synthesis.Reference of Dimethoxydiphenylmethane

Etayo, Pablo;Badorrey, Ramon;Diaz-de-Villegas, Maria D.;Galvez, Jose A. published 《Chiral Amino Diol Derivatives as New Modular Organocatalysts for the Enantioselective α-Chlorination of Cyclic β-Keto Esters》. The research results were published in《Advanced Synthesis & Catalysis》 in 2010.Reference of Dimethoxydiphenylmethane The article conveys some information:

Highly modular chiral amino diol derivatives, e.g. I, have been used as organocatalysts in the enantioselective α-chlorination of cyclic β-keto esters. Optimization of the catalyst structure and the reaction conditions has allowed the synthesis of optically active α-chlorinated products with high enantioselectivities (up to 96% ee) using inexpensive com. available N-chlorosuccinimide (NCS) as the chlorine source under mild conditions.Dimethoxydiphenylmethane (cas: 2235-01-0) were involved in the experimental procedure.

For example, the most common synthesis of ethers involves the attack of an alkoxide ion on an alkyl halide. This method is called Williamson ether synthesis.Reference of Dimethoxydiphenylmethane

Reference:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem