Assembly of 5-nitro-1, 2, 3-benzenetricarboxylic acid (H3nbta) with CuII in the presence of 1, 3-bis (1, 2, 4-triazol-1-yl) propane (1, 3-btp) leads to a new metal–organic framework,[Cu (Hnbta)(1, 3-btp)]· 2H2O (A1), which is shown to be an efficient and recyclable heterogeneous catalyst for enamination of β-ketoesters with excellent product yields and selectivity.
