An efficient transformation of methyl gallate to Eusiderin G7, a neolignan with 1,4 - benzodioxane nuclei,in six steps with 24% overall yield is reported. This route is distinctly shorter, more economic and efficient than any of the previous approaches to the target reported in the literature. The key step is a cyclization of an dihydroxy intermediate 4 catalysted by a strong acid ion exchange resin to give 1, 4 - benzodioxane skeleton.