(t-Bu)2PNP(i-BuNCH2CH2)3N: New Efficient Ligand for Palladium-Catalyzed C-N Couplings of Aryl and Heteroaryl Bromides and Chlorides and for Vinyl Bromides at Room Temperature
Ch. Venkat Reddy, Jesudoss V. Kingston and John G. Verkade*
*Department of Chemistry, Iowa State University, Ames, Iowa 50011, Email: jverkadeiastate.edu
Ch. V. Reddy, J. V. Kingston, J. G. Verkade, J. Org. Chem., 2008, 73, 3047-3062.
DOI: 10.1021/jo702367k (free Supporting Information)
By employing Pd(OAc)2 and (t-Bu)2PNP(i-BuNCH2CH2)3N as ligand, a broad range of aryl bromides and chlorides possessing base-sensitive substituents provide coupling products with bulky aryl amines in good to excellent yields. An efficient coupling of vinyl bromides with a variety of amines produces imines and enamines at room temperature.
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S. Urgaonkar, M. Nagarajan, J. G. Verkade, J. Org. Chem., 2003, 68, 452-459.