對位取代酚和聚甲醛在對甲基苯磺酸的催化下，可聚合得到之主要產物為6．substituted-1,3-benzodioxin和/或bis-(6-substituted-1,3-benzodioxin-8-yl)methane。若酚的對位取代基為拉電子性時，其產物通常為6-substituted-1,3-benzodioxin，若酚的對位取代基為烷基或溴基時，則兩種產物都會生成。
Under an acidic condition, the condensation of p-substituted phenols andparaformaldehyde gave 6-substituted-1,3-benzodioxin and/or bis-(6-ubstituted-1,3-benzodioxin-8-yl)methane as the major products. The p-substitutedphenols with electron withdrawing groups attached gave only the 6-substituted-1, 3-benzodioxin products, while the p-alkylphenols and p-bromophenolyielded both products.
