| abstract |
Substituted aromatic or heteroaromatic hydroxy compounds for use as additives in the Ru compound-catalysed dimerization to g straight chain acrylonitrile dimers are claimed. Additives for production of straight-chain acrylonitrile dimers by Ru compound-catalysed acrylonitrile dimerization compris (a) aromatic OH compounds; or (b) N-, O- and/or S-containing heteroaromatic OH compounds. Each should have ≥ 1 alkoxycarbonyl substituent and ≥ 1 further ring substituent comprising halogen, CN, amino, amido urethane, sulfonyl, phosphonyl, formyl or 1-10C alkyl, alkoxy, alkyloxo, alkylsulfinyl, alkylamino, haloalkyl or alkoxycarbonyl. Independent claims are included for: (i) the Ru compound-catalysed dimerization in presence of the additives; (ii) catalyst systems for the dimerization comprising a Ru compound and the additive. |