Enolesters as chain end‐functionalizing agents for the living ring opening metathesis polymerization. Issue 18 (24th January 2017)

• Record Type: Journal Article
• Authors: Liu, Peng; Yasir, Mohammad; Kurzen, Helena; Hanik, Nils; Schäfer, Mark; Kilbinger, Andreas F. M.
• Is Part Of: Journal of polymer science. Volume 55:Issue 18(2017)
• Page Start: 2983
• Page End: 2990
• Publication Date: 2017-01-24
• Subjects: enolesters -- functionalization of polymers -- Grubbs catalyst -- metathesis -- ROMP; 547
• DOI: 10.1002/pola.28468
• Languages: English
• ISSNs: 0887-624X

Abstract

ABSTRACT: Functional enolethers have previously been used to introduce functional end groups at the chain end of ruthenium carbene complex initiated living ring opening metathesis polymers. Here, we investigated whether the weaker π‐donating enolesters could equally be used in regio selective reactions with ruthenium carbene complexes and thus as polymer end‐functionalization reagents. Enolesters such as vinyl acetate, butenyl acetate, 3‐(4‐( tert ‐butoxy)phenyl)propenyl acetate and 6‐(((benzyloxy)carbonyl)amino)hex‐1‐en‐1‐yl acetate were used as living ROMP terminating agents. All gave the expected end groups proving that enolesters are synthetically easily accessible targets for living ROMP end‐functionalization. © 2017 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem.2017, 55, 2983–2990 Abstract : They are synthetically readily accessible from functional aldehydes. In a terminal olefin metathesis reaction step they form ruthenium acyl Fischer‐carbenes and transfer the functional group to the polymer chain end.