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Synthesis of dimethylaminoethyl chitin and applications as a polymeric ligand to form Rh cluster complexes for the reduction of benzaldehyde and nitrobenzene
Author(s) -
Zhu Hong,
Mizugaki Tomoo,
Kaneda Kiyotomi
Publication year - 2000
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/1521-3935(20000801)201:13<1431::aid-macp1431>3.0.co;2-a
Subject(s) - nitrobenzene , benzaldehyde , chitin , chemistry , sodium hydride , polymer chemistry , hydride , chloride , catalysis , organic chemistry , metal , chitosan
A chitin containing dimethylaminoethylated group (DMAE‐chitin) was prepared by the reaction of chitin with (dimethylamino)ethyl chloride in homogeneous or heterogeneous conditions. Compared with heterogeneous dimethylaminoethylation, DMAE‐chitin with higher DS and more effectiveness for the desired reduction could be obtained homogeneously in the presence of sodium hydride under DMAc/LiCl solution. By the combination of suitable DMAE‐chitin with Rh 6 (CO) 16 , benzaldehyde and nitrobenzene could be converted into correspondingly reductive products in high yields under the WGSR condition. Using the polymer‐bound Rh cluster catalysts, the hydrogenation occurred in a triphase system, which made work‐up procedures simple.