Facile Routes to Alkoxymaleimides/Maleic Anhydrides
作者:Narshinha P. Argade、Manoj Kumar Sahoo、Santosh B. Mhaske
DOI:10.1055/s-2003-37351
日期:——
New routes to alkoxymaleic anhydrides 1a/b have been described in good yields via base-induced chemoselective vinylic substitution of bromo atom in bromomaleimide 4 with alkanols, and base-induced oxa-Micahel addition of alkanols to dialkyl acetylenedicarboxylates 8a/b as key steps. An unusual acyl exchange in the conversion of 6a/b to 1a/b under very simple and mild reaction conditions is noteworthy.
The invention relates to a polymer composition on the basis of a copolymer of an unsaturated carboxylic anhydride and a vinyl aromatic monomer plus a rubber modified with reactive groups to a graft copolymer. By addition of a phenoxy resin a polymer composition is obtained which offers good notched impact resistance as well as good thermostability.