Condensation of benzaldehyde with veratrole in acidic media affords a one-pot synthesis of 2, 3, 6, 7-tetramethoxy-9,10-diphenylanthracene 1f. The reaction of 1f with dimethyl acetylenedicarboxylate does not yield the expected adduct but leads directly to the tetramethyl 9, 10-diphenylanthracene-2,3,6,7-tetracarboxylate 9b and other products, through successive cyclo-additions followed by spontaneous
在酸性介质中,
苯甲醛与
四氢呋喃的缩合反应可一锅合成2、3、6、7-四甲氧基-9,10-二苯基
蒽1f。1f与
乙炔二
甲酸二甲酯的反应不会产生预期的加合物,而是通过连续的环加成反应继而自发消除二
甲氧基乙炔,直接导致四甲基9、10-二苯基
蒽-2,3,6,7-四
羧酸酯9b和其他产物或甲氧碳炔。