title: A carbon nanotube confinement strategy to implement homogeneous asymmetric catalysis in the solid phase.
abstract: A readily recyclable asymmetric catalyst has been developed based on the self-assembly of a homogeneous catalyst in a fibrous network of multiwalled carbon nanotubes (MWNTs). Dimerization of an amide-based chiral ligand with a suitable spacer allows for the efficient formation of a heterogeneous catalyst by self-assembly on addition of Er(OiPr)3. The self-assembly proceeds in the MWNT fibrous network and small clusters of assembled catalyst are confined in the MWNTs, producing an easily handled solid-phase catalyst. The resulting MWNT-confined catalyst exhibits a good catalytic performance in a catalytic asymmetric Mannich-type reaction, which can be conducted in a repeated batch system and in a continuous-flow platform.
authors: Institute of Microbial Chemistry (BIKAKEN) Tokyo, 3-14-23 Kamiosaki, Shinagawa-ku, Tokyo 141-0021 (Japan), Fax: (+81) 3-3441-7589.
authors: Kazuki
authors: K
authors: Hashimoto
authors: Naoya
authors: N
authors: Kumagai
authors: Masakatsu
authors: M
authors: Shibasaki
mesh_terms: D002384:Catalysis; D004871:Erbium / Q000737:chemistry*; D015394:Molecular Structure; D037742:Nanotubes, Carbon / Q000737:chemistry*; D013237:Stereoisomerism
chemical_list: D037742:Nanotubes, Carbon; D004871:Erbium
keywords: Mannich reaction; asymmetric catalysis; carbon nanotubes; erbium; heterogeneous catalysis