An improved process for the manufacture of the antipsoriatic agent, 6-chloro-1,4-diacetoxy-2,3-dimethoxynaphthalene, is herein described which involves in situ Diels-Alder coupling of 2,3-dimethoxybenzo-1,4-quinone with a 3-chloro-1-alkoxy-1,3-butadiene; 1,4-elimination of the alcohol with aromatization of the chlorine-bearing ring, and acetylation.
                            本文介绍了一种改进的制造抗牛皮癣剂6-
氯-1,4-
二乙酰氧基-
2,3-二甲氧基萘的方法,其中包括2,3-二
甲氧基苯醌与3-
氯-1-烷氧基-
1,3-丁二烯的原位Diels-Alder偶联;醇的1,4-消除,带
氯环的芳香化和乙酰化。