摘要 |
Dinitriles are prepd. by the addn. of HCN to non-coniugated unsatd. nitriles, esp. 3- or 4-pent-enenitrile in the presence of a zero- valent nickel catalyst and a arylborane promoter. In the reaction process, the HCN is added in at least 2 continuous stages and at least 10 wt.%, pref. 15 wt.%, of the HCN is introduced in each step. The catalyst is NiL4 [L=P(OAr)3, Ar=C1-18 aryl! and the promoter is Br3 [R=C6-12 aryl . Dinitriles are intermediates for polyamides such as nylon. |