02108nas a2200277   4500008004100000022001400041245013500055210006900190260009500259300001200354490000800366520111500374653001301489653001301502653001101515653001001526653002001536653001801556653001901574653001701593653001501610100002701625700001901652700002801671856013101699       2007                        eng d  a0021-951700aCopper(II) ion exchanged A1SBA-15: a versatile catalyst for intermolecular hydroamination of terminal alkynes with aromatic amines0 aCopperII ion exchanged A1SBA15 a versatile catalyst for intermol  a525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USAbACADEMIC PRESS INC ELSEVIER SCIENCEcSEP  a274-2820 v2503 a<p>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.</p>10aA1SBA-1510aaddition10aalkyne10aAmine10aCopper catalyst10aheterogeneous10ahydroamination10aion exchange10aMesoporous1 aShanbhag, Ganapati, V.1 aJoseph, Trissa1 aHalligudi, Shivaraj, B.  uhttps://library.ncl.res.in/content/copperii-ion-exchanged-a1sba-15-versatile-catalyst-intermolecular-hydroamination-terminal-002095nas a2200289   4500008004100000022001400041245016000055210006900215260007300284300001000357490000800367520107900375653001301454653002101467653001301488653001301501653001301514653001001527653002001537653001301557653001901570653001501589100002701604700001901631700002801650856012701678       2008                        eng d  a1381-116900aChemoselective synthesis of beta-amino acid derivatives by hydroamination of activated olefins using AISBA-15 catalyst prepared by post-synthetic treatment0 aChemoselective synthesis of betaamino acid derivatives by hydroa  aPO BOX 211, 1000 AE AMSTERDAM, NETHERLANDSbELSEVIER SCIENCE BVcAPR  a16-230 v2843 a<p>beta-Amino acid derivatives have a wide variety of applications viz. in the synthesis of peptide analogues, precursor for amino alcohols, optically active amino acids, lactums and diamines. Chemoselective anti-Markovnikov hydroamination reaction of activated olefins was effectively used to synthesize beta-amino acid derivatives using AlSBA-15 and AlMCM-41 catalysts. These catalysts with different Si/Al ratios were synthesized by isomorphous substitution of aluminium into the framework of SBA-15, which induces the Bronsted and Lewis acid sites. The structural integrity of the catalysts was established by characterizing with XRD, N-2-sorption, TEM, NH3-TPD Al-27 MAS NMR and Si-29 MAS NMR techniques. Hydroamination of ethyl acrylate with aniline was used as a test reaction, which gave N-[2-(ethoxycarbonyl)ethyl] aniline with high selectivity. The performance of AlSBA-15 catalyst was also determined with different acrylates and amines to know the general applicability of the catalyst in hydroamination reactions. (C) 2008 Elsevier B.V. All rights reserved.</p>10aacrylate10aactivated olefin10aaddition10aAlMCM-4110aAlSBA-1510aAmine10abeta-amino acid10aCatalyst10ahydroamination10aMesoporous1 aShanbhag, Ganapati, V.1 aKumbar, S., M.1 aHalligudi, Shivaraj, B.  uhttps://library.ncl.res.in/content/chemoselective-synthesis-beta-amino-acid-derivatives-hydroamination-activated-olefins-0