KAGA Harumi Hokkaido National Industrial Research Institute, Senior Researcher, 北海道工業技術研究所・機能物質化学研究室, 室長(研究職)
SATHO Toshifumi Hokkaido Univ., Grad.School of Eng., Lect., 大学院・工学研究科, 助手 (80291235)
YOKOTA Kazuaki Hokkaido Univ., Grad.School of Eng., Prof., 大学院・工学研究科, 教授 (30001217)
|Budget Amount *help
¥11,200,000 (Direct Cost : ¥11,200,000)
Fiscal Year 2000 : ¥2,200,000 (Direct Cost : ¥2,200,000)
Fiscal Year 1999 : ¥3,700,000 (Direct Cost : ¥3,700,000)
Fiscal Year 1998 : ¥5,300,000 (Direct Cost : ¥5,300,000)
The research aimed to establish the synthesis of novel polymers consisting of heterocyclic units by the ring-opening and ring-forming polymerization of bifunctional monomers, such as 1)the cyclopolymerization of chiral dianhyro pentitol, 2)the cyclopolymerization of meso diahnydro pentitol and meso diahnydro hexitol, and 3)the diastereoselective cyclopolymerization of meso diepisulfide.
1)The cationic polymerization of the chiral dianhyro pentitol, 1, 2 : 4, 5-dianhydro-3-O-methyl-L-arabinitol was regeo-and stereoselective to form the organic solvent-soluble polymer consisting 1, 4-anydro-3-O-methyl-adonitol units.
2)For meso-diepoxides, the cationic polymerization of 1, 2 : 4, 5-dianhydro-3-O-methyl-xilitol proceeded as well as the chiral dianhyro pentitol to produce the carbohydrate polymer consisting 1, 4-anydro-3-O-methyl-arabinitol units. In addition, the cyclopolymerization of a meso hexitol, 1, 2 : 5, 6-dianhydro-3, 4-di-O-methyl-allitol, produced the polymers consisting of the 5-and 6-membered cyclic units using anionic and cationic initiators, respoctively. For 1, 2 : 5, 6-dianhydro-3, 4-di O-methyl-galactitol, the polymerization using the anionic initiator was regeo-and stereoselective, whereas the cationic one was not regular.
3)The polymerization of a meso-diepisulfide, which was synthesized from 1, 2 : 5, 6-dianhydro-3, 4-di-O-methyl-galactitol, using the chiral zinc complex was diastereoselective to afford the chiral polymer consisting of the 5-membered cyclic and uncyclic units.