Niobium chloride in 1−n−butyl−3−methylimidazolium chloride ionic liquid as a catalyst for biginelli reaction

Polymer/ZIF‐67 composite as an effective and recyclable nanocatalyst for Biginelli reaction

“…PAA/ZIF-67 exhibits benefits in terms of cost-effectiveness, reaction time, simplicity, yield, solvent, and temperature. Anionic Zn (II)-MOF 10 wt% 2 h -60 93 [53] PTA@MIL-101 0.006 mmol 1 h -100 90 [54] Cu-based MOF 0.1 mmol 2 h -60 86 [55] ompg-C 3 N 4 /SO 3 H 30 mg 30 min EtOH reflux 94 [56] BIL-SO 3 H 2.5 mol % 3 h EtOH 80 98 [57] COF-IM-SO 3 H 8.64 mg (1.0 mol%) 2.5 h -90 98 [15] Ni-DDIA 0.005 mmol 30 min -80 84.6 [16] 0.2NbCl 5 -BMImCl 5 mol% 30 min -100 90 [17] PAA/ZIF-67 15 mg 30 min -75 94 This work PAA/ZIF-67 nanocomposite was fabricated by growing ZIF-67 onto the surface of PAA and applied as a recoverable catalyst for the one-pot synthesis of dihydropyrimidinone derivatives via the condensation of various aldehydes, urea, and ethyl acetoacetate under solventfree conditions. This composite demonstrated a combination of fascinating features, including high surface area, stability, and redispersing capability.…”

“…To overcome these problems, various heterogeneous catalysts with exceptional properties, including facile separation of product, easy catalyst recycling, good stability, and relatively mild reaction conditions, were designed and fabricated. [13][14][15][16][17][18][19][20] Metal-organic frameworks (MOFs) consisting of organic linkers and metal ions are striking class of porous crystalline materials that receive increasing research attention. [21][22][23][24][25][26][27][28][29][30][31] As a result of their exceptional physicochemical features, including high porosity, great surface area, tunable functionality, high structural diversity, and easy synthetic techniques, MOFs can be outstanding candidates for the production of heterogeneous catalysts.…”

“…To overcome these problems, various heterogeneous catalysts with exceptional properties, including facile separation of product, easy catalyst recycling, good stability, and relatively mild reaction conditions, were designed and fabricated. [ 13–20 ]…”