Accession Number : ADA295527
Title : The Synthesis of ROMP Homopolymers and Multi-Block Copolymers Containing Sugars.
Descriptive Note : Technical rept.,
Corporate Author : MASSACHUSETTS INST OF TECH CAMBRIDGE DEPT OF CHEMISTRY
Personal Author(s) : Nomura, K. ; Schrock, R. R.
PDF Url : ADA295527
Report Date : 14 JUN 1995
Pagination or Media Count : 10
Abstract : Ring-opened homopolymers of 1,2:3,4-di-O-isopropylidene-alpha-D-galactopyranos-6-O-yl- 5-norbomene-2-carboxylate (1) and bis(1,2:3,4-di-O-isopropylidene-alpha-D galactopyranos-6-O-yl)-5-norbornene-2,3-dicarboxylate (2) were prepared in toluene in a living manner using Mo(CHCMe2Ph)(N-2,6-i-Pr2C6H3)(O-t-Bu) 2 as the initiator. These homopolymers havelow PDI's (as low as 1.06) and molecular weights that are proportional to the number of monomers added. Various di-, tri-, and tetra-block copolymers containing 1, 2, methyltetracyclododecene (MID, 3), or trans-2,3- bis(trimethylsilyloxymethyl)-norborn-5-ene (4) could also be prepared and were found to have polydispersities as low as 1.03. The sugars are easily deprotected to give sugar- derivatized, water-soluble polymers.
Descriptors : *POLYMERS, *SYNTHESIS(CHEMISTRY), *MONOMERS, *SUGARS, SYNTHESIS, WATER, MOLECULAR WEIGHT, TOLUENES.
Subject Categories : Biochemistry
Distribution Statement : APPROVED FOR PUBLIC RELEASE