acid–base assembly of multidentate chiral primary amines and solid polyacids is presented. A suitable structurally distinctive C2-symmetric chiral primary amine (CPA) was identified in this study and the optimal CPA–POM hybrid obtained catalyzed the Diels–Alder cycloaddition of α-substituted acroleins in high yields and fair-to-high selectivity underaqueousconditions. The primary amine in the metal–organic-framework