Efficient Synthesis of Novel N-Substituted Bulky Diphosphinoamines

Abstract

A convenient procedure for the facile preparation of electron-rich bulky diphosphinoamines from alkylamines and chlorodiphenylphosphine has been developed. The choice of solvent proved to be critical to the successful synthesis of the diphosphinoamine (PNP) products.

Key words

alkylamines - ethylene oligomerisation catalysis - solvent effects - diphoshinoamine ligands - steric hindrance

References

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9

¹H NMR (CDCl₃): δ = 1.35 (s, 9 H, t-C₄H₉), 2.10 (d, J = 11.6 Hz, 1 H, NH), 7.27-7.36 (m, 6 H, ArH), 7.40-7.45 (m, 4 H, ArH).

12

N,N-Bis(diisopropylphosphanyl)ethylamine: ³¹P NMR (162 MHz, CDCl₃): δ = 83.9 (s).