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Synthesis 2007(24): 3863-3867  
DOI: 10.1055/s-2007-990868
PAPER
© Georg Thieme Verlag Stuttgart · New York

Efficient Synthesis of Novel N-Substituted Bulky Diphosphinoamines

Munaka C. Maumela*a, Kevin Blanna, Henriëtte de Boda, John T. Dixona, William F. Gabriellia, D. Bradley G. Williamsb
a Sasol Technology (Pty) Ltd, R & D Division, 1 Klasie Havenga Road, Sasolburg 1947, South Africa
Fax: +27(11)5220784; e-Mail: chris.maumela@sasol.com;
b University of Johannesburg, P.O. Box 524, Auckland Park 2006, South Africa
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Publikationsverlauf

Received 2 August 2007
Publikationsdatum:
31. Oktober 2007 (online)

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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

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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).