| abstract |
The present invention comprises the steps of reacting a 2-substituted benzenesulfonate or a 2-substituted velsensulfonate, which is further substituted at the 3,4 or 5-position with a lithium compound to form an intermediate compound, and the intermediate compound is electrophile Reacting with to form a 2,6-disubstituted benzenesulfonate or a 2,6-disubstituted benzenesulfonate further substituted at the 3,4 or 5-position. Provided are methods for preparing the compounds. |