A Synthesis of Aromatic Five- and Six-Membered B−N Heterocycles via Ring Closing Metathesis
摘要:
[GRAPHICS]The ring closing metathesis on appropriate vinyl or allyl aminoboranes (1 or 2) gives azaboracycloalkenes (3 or 4) which can be converted to azaborolides (5) or azaborines (6).
Yttriumcomplex 3, the first example of a group III metal alkylcomplex with an ancillary 1,2-azaborolyl ligand, was prepared and characterized; complex 3 initiates methyl methacrylate (MMA) polymerization with living character to afford syndiotactic-rich poly(methyl methacrylate) (PMMA).