Condensation of the α-lithio derivative of 3-substituted 4,4-dialkoxybutanoates, butanenitriles, and butanamides with methoxy-activated aromatic aldehydes, followed by treatment with refluxing dilute sulfuric acid gives rise to substituted naphthalene products. In this manner, 2,6,7-tri- and 2,3,6,7-tetrasubstituted naphthalenes are synthesized in high yields on a multigrarn scale.
将 3-取代的 4,4-二烷氧基
丁酸酯、
丁烯腈和丁酰胺的 δ-
硫代衍
生物与甲氧基活化的芳香醛缩合,然后用回流的稀
硫酸处理,可得到取代的
萘产品。通过这种方法,可以在多栅规模上高产率合成 2,6,7 三取代
萘和 2,3,6,7 四取代
萘。