Patent ID: 7732541
Filing Date: 2010-06-08
Classification: C08G

Abstract:
1. Process for preparing a polymer whose skeleton comprises a sequence of units of formula (I′): in which: R R′ the radicals R the said radicals R 1 , R′ 2 , R 3 and R 4 possibly comprising, when they represent a hydrocarbon-based group, one or more substituents chosen from halogen groups, alkyl groups of 1 to 20 carbon atoms, alkoxy groups of 1 to 20 carbon atoms, aryl groups of 6 to 20 carbon atoms, aryloxy groups of 6 to 20 carbon atoms and amino groups, the said process comprising a step consisting in reacting, in suitable amount: at least one ylide compound corresponding to formula (2) below: in which the radicals R 1 , R′ 2 , R 3 and R 4 correspond to the same definition as that given above, E being a leaving group, with a trivalent boron compound, comprising at least one group capable of migrating, so as to obtain the said sequence of units of formula (I′) as defined above.