Ru-Catalyzed Isomerization Provides Access to Alternating Copolymers via Ring-Opening Metathesis Polymerization

• DOI: 10.1021/acs.macromol.5b01058
• Publication Date: 2015-07-07T16:07:07Z
• Authors: Li Tan; Guofang Li; Kathlyn A. Parker; Nicole S. Sampson
• Keywords: ROMP

We describe an isomerization–alternating ROMP protocol that gives linear copolymers with rigorous sequence alternation. Bicyclo[4.2.0]oct-7-ene-7-carboxamides of primary amines are isomerized in the presence (3-BrPyr)2Cl2(H2IMes)Ru═CHPh to corresponding bicyclo[4.2.0]oct-1(8)-ene-8-carboxamides which olefinic bond is tetrasubstituted. The amides undergo alternating ring-opening metathesis polymerization cyclohexene provide soluble and molecular weights up ∼130 kDa. This process provides efficient entry strictly can display diverse functional groups.