In this contribution, the additive-free hydroamination of piperylene, an easily accessible
1,3-diene from naphtha steamcracking, with morpholine is described. This reaction
provides an atom economic access to allylic C5 amines in a single step from commercially available and air-stable precursors and
ligands. Detailed investigations revealed (DPPB)Pd(CCl3CO2)2 as the most active catalyst. After a 12-hour reaction period, a total yield of 79%
allylic amines was obtained in the presence of 0.3 mol% catalyst. Furthermore, a noteworthy
influence of the catalyst counter ion and the substrate concentration was discovered.
Key words
homogeneous catalysis - hydroamination - dienes - amines - additive-free - piperylene
- palladium