Arora et al.

, p. 1849 (1973)

Selective and Additive-Free Hydrogenation of Nitroarenes Mediated by a DMSO-Tagged Molecular Cobalt Corrole Catalyst

Sch?fberger, Wolfgang,Timelthaler, Daniel,Topf, Christoph

supporting information, p. 2114 - 2120 (2021/07/22)

We report on the first cobalt corrole that effectively mediates the homogeneous hydrogenation of structurally diverse nitroarenes to afford the corresponding amines. The given catalyst is easily assembled prior to use from 4-tert-butylbenzaldehyde and pyrrole followed by metalation of the resulting corrole macrocycle with cobalt(II) acetate. The thus-prepared complex is self-contained in that the hydrogenation protocol is free from the requirement for adding any auxiliary reagent to elicit the catalytic activity of the applied metal complex. Moreover, a containment system is not required for the assembly of the hydrogenation reaction set-up as both the autoclave and the reaction vessels are readily charged under a regular laboratory atmosphere.

Organoimido-derivatized hexamolybdates with a remote carboxyl group: Syntheses and structural characterizations

Sima, Guohui,Li, Qiang,Zhu, Yi,Lv, Chunlin,Khan, Rao Naumaan Nasim,Hao, Jian,Zhang, Jin,Wei, Yongge

, p. 6551 - 6558 (2013/07/11)

Four novel organoimido derivatives of hexamolybdate containing a remote carboxyl group have been synthesized: [Bu4N]2[Mo 6O18(N-C6H4-3-COOH)] (1), [Bu 4N]2[Mo6O18(N-C6H 4-2-CH3-4-COOH)] (2), [Bu4N] 2[Mo6O18(N-C6H4-2-CH 3-5-COOH)] (3), and [Bu4N]2[Mo 6O18(N-C6H4-2-CH3-3-COOH) ] (4) with 3-aminobenzoic acid, 4-amino-3-methylbenzoic acid, 3-amino-4-methylbenzoic acid, and 3-amino-2-methylbenzoic acid as the imido-releasing agents, respectively. Their structures have been characterized by IR, UV-vis, 1H NMR, ESI-MS, and single-crystal X-ray diffraction techniques. Hydrogen bonding interactions play an important role in the supramolecular assemblies of these compounds in the solid state. Although the incorporated organic ligands are similar to each other, their supramolecular assembly behaviors are quite different. For compound 1, the dimer structure is formed via hydrogen bonding between the carboxyl group and the POM cluster of two neighboring cluster anions. For compound 2, the 1D chain structure is formed via hydrogen bonding between the carboxyl groups and the POM clusters of the cluster anions. For compound 3, the 2D plane structure is formed via two types of hydrogen bonding between the aromatic rings and the POM clusters of the cluster anions. For compound 4, the 1D plus 2D structures are formed via three types of hydrogen bonding between the aromatic rings and the POM clusters of the two types of cluster anions with different orientations.