In a method for producing a de-dimethoxybenzylated compound by removing a dimethoxybenzyl group from a compound containing a dimethoxybenzyl group bonded to a nitrogen atom in the presence of an acid, the de-dimethoxybenzylated compound is obtained by removing the dimethoxybenzyl group without forming a poorly soluble product resulting from the removed dimethoxybenzyl group. The de-dimethoxybenzylation reaction is carried out in the presence of triphenylphosphine or diethylthiourea.
Disclosed herein are therapeutic agents and/or preventive agents for pain or therapeutic agents and/or preventive agents for a sodium channel associated disease. The present invention provides compounds represented by the following formula (I) or pharmacologically acceptable salts thereof:
Disclosed herein are therapeutic agents and/or preventive agents for pain or therapeutic agents and/or preventive agents for a sodium channel associated disease. The present invention provides compounds represented by the following formula (I) or pharmacologically acceptable salts thereof:
Disclosed herein are therapeutic agents and/or preventive agents for pain or therapeutic agents and/or preventive agents for a sodium channel associated disease. The present invention provides compounds represented by the following formula (I) or pharmacologically acceptable salts thereof:
In a method for producing a de-dimethoxybenzylated compound by removing a dimethoxybenzyl group from a compound containing a dimethoxybenzyl group bonded to a nitrogen atom in the presence of an acid, the de-dimethoxybenzylated compound is obtained by removing the dimethoxybenzyl group without forming a poorly soluble product resulting from the removed dimethoxybenzyl group. The de-dimethoxybenzylation reaction is carried out in the presence of triphenylphosphine or diethylthiourea.