MCM-41-immobilized bidentate nitrogen copper(I) complex: a highly efficient and recyclable catalyst for Buchwald N-arylation of indoles

CuCl2 heterogenized on metformine‐modified polystyrene resin as an antibacterial agent and recyclable nanocatalyst for Ullmann‐type C‐N coupling reactions

“…From Table 3, it can be seen that present catalyst exhibited higher conversions and yields compared to the other reported catalysts. [23] 10 mol% CuI/20 mol% Metformine DMF, CsCO 3 , 130°C, 12 h. 94 [24] Indole + MCM-41-2 N-CuI (4.0 mol %) K 3 PO 4 , toluene, 110°C, 24 h. 90 [25] 4-CH 3 OC 6 H 4 I Polystyrene-supported copper (II) H 2 O, K 2 CO 3 , CTAB, 110°C, 10 h. 81 [26] 10 mol% CuI/ 20 mol% 2,2′-bipyridine K 3 PO 4 , betain, H 2 O, 90°C, 10 h 81 [27]…”

MCM-41-immobilized Schiff base-pyridine bidentate copper(I) complex as a highly efficient and recyclable catalyst for the Sonogashira reaction

“…To date, functionalized MCM-41-immobilized palladium or rhodium complexes have been prepared and successfully used in organic reactions [45][46][47][48][49]. Very recently, we have reported the synthesis of 3-(2-aminoethylamino)propyl-functionalized MCM-41-immobilized copper(I) complex and found that it is a highly efficient and recyclable heterogeneous catalyst for the homo-and heterocoupling of terminal alkynes [35] and C-N or C-S bond formation reactions [50][51][52]. In continuing our efforts to develop greener synthetic pathways for organic transformations, our new approach, described in this paper, was to design and synthesize a novel MCM-41-immobilized Schiff base-pyridine bidentate copper(I) complex (MCM-41-Sb,Py-CuI), which was used as an effective copper catalyst for M A N U S C R I P T A C C E P T E D ACCEPTED MANUSCRIPT 4 the Sonogashira reaction of aryl halides with terminal alkynes.…”

Nickel‐catalyzed Buchwald–Hartwig amination of pyrimidin‐2‐yl tosylates with indole, benzimidazole and 1,2,4‐triazole

“…Periasamy and co‐workers developed diamine‐ and CuI‐catalyzed N ‐arylation reaction of indole with aryl halides in good yields. Cai and co‐workers also reported the analogous N ‐arylation of indole in the presence of [MCM‐41‐2N‐CuI] complexes. Although aryl halides exhibit relatively high electrophilic reactivity in these Buchwald N ‐arylation reactions, they still suffer from several disadvantages such as harsh preparation steps, easy formation of coupling byproducts, halide waste and environmental pollution .…”