Toluene → 2,2'-Dimethoxy-1,1'-binaphthalene

Participants

Reaction Steps

14.3 g 2,2′-Dihydroxy-1,1′-binaphthyl prepared in the step a) of the Example 19, 40 ml sodium hydroxide with the concentration of 7.5%, 0.5 g tetrabutylammonium hydrogen sulfate and 40 ml methylbenzene are added to a round bottom flask with the volume of 100 mL. 16.4 g dimethyl sulfate is dropwise added to the round bottom flask to perform stirring reaction at 70° C.; and after the reaction is performed for 4 hours, the reaction product is filtered to obtain 2,2′-dimethoxy-1,1′-binaphthyl. The methylbenzene is separated from the filtrate. The aforementioned reaction is repeated, and recycling of the methylbenzene five times leads to the results in Table 7.

Provenance & Evidence