TY - JOUR T1 - Copper(II) ion exchanged A1SBA-15: a versatile catalyst for intermolecular hydroamination of terminal alkynes with aromatic amines JF - Journal of Catalysis Y1 - 2007 A1 - Shanbhag, Ganapati V. A1 - Joseph, Trissa A1 - Halligudi, Shivaraj B. KW - A1SBA-15 KW - addition KW - alkyne KW - Amine KW - Copper catalyst KW - heterogeneous KW - hydroamination KW - ion exchange KW - Mesoporous AB -

The hydroarnination reaction offers a very attractive route for the synthesis of alkylated amines and their derivatives with no byproduct formation. AISBA-15 was synthesized by isomorphous substitution of aluminum into the framework of SBA-15, which induces the Bronsted acid sites, and these were exchanged with metal ions such as Cu2+, Zn2+, and Pd2+. The catalysts were characterized by XRD, N-2-sOrption, SEM, TEM, acidity measurements by FT-IR pyridine adsorption, H-2-TPR, (27)AI MAS NMR, and Si-29 MAS NMR. Hydroamination of phenylacetylene (PhAc) with 2,4-xylidine has been used as a test reaction, which gave N-(1-phenylethylidene)-2,4-dimethylaniline with no byproduct formation. CuAlSBA-15 and CuAIMCM-41 showed around three times greater activity in hydroamination of PhAc compared with Cu-clay and Cu-beta, due to the moderate Lewis acidity of Cu2+ present in mesoporous supports. The performance of the CuAlSBA-15 was also determined with different alkynes and amines to evaluate the catalyst's general applicability in hydroamination reactions. (c) 2007 Elsevier Inc. All rights reserved.

PB - ACADEMIC PRESS INC ELSEVIER SCIENCE CY - 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA VL - 250 IS - 2 U3 - Foreign U4 - 7.354 ER -