1198597-04-4Relevant articles and documents
Monotelechelic poly(oxa)norbornenes by ring-opening metathesis polymerization using direct end-capping and cross-metathesis
Matson, John B.,Grubbs, Robert H.
, p. 213 - 221 (2010)
Two different methodologies for the synthesis of monotelechelic poly(oxa)norbornenes prepared by living ring-opening metathesis polymerization (ROMP) are presented. The first method, termed direct end-capping, is carried out by adding an internal ciss-olefin terminating agent (TA) to the reaction mixture immediately after the completion of the living ROMP reaction. The second method relies on crossmetathesis (CM) between a methylene-terminated poly(oxa)norbornene and a cis-olefin TA mediated by the ruthenium olefin metathesis catalyst (H2IMeS)(Cl)2Ru(CH-o-OiPrC 6H4) (H2IMeS = 1,3-dimesitylimidazolidine-2- ylidene). TAs containing various functional groups, including alcohols, acetates, bromides, a-bromoesters, thioacetates, N-hydroxysuccinimidyl esters, and Boc-amines, as well as fluorescein and biotin groups, were synthesized and tested. The direct end-capping method typically resulted in > 90% endfunctionalization efficiency, while the CM method was nearly as effective for TAs without polar functional groups or significant steric bulk. End-functionalization efficiency values were determined by 1H NMR spectroscopy.
Synthesis of hybrid block copolymers via integrated ring-opening metathesis polymerization and polymerization of NCA
Bai, Yugang,Lu, Hua,Ponnusamy, Ettigounder,Cheng, Jianjun
supporting information; experimental part, p. 10830 - 10832 (2011/11/04)
Linear hybrid block copolymers with well controlled molecular weights and narrow polydispersities were synthesized via ring-opening metathesis polymerization (ROMP) followed by ring-opening polymerization of amino acid N-carboxyanhydrides.
