Direct, one-pot synthesis of POCOP-type pincer complexes from metallic nickel

作者：Vabre Boris^*; Lindeperg Fabien; Zargarian Davit

来源：Green Chemistry, 2013, 15(11): 3188-3194.

DOI：10.1039/c3gc40968f

A one-pot procedure has been developed for the direct and atom-economical preparation of the pincer-type complexes (R'-POCOPR)NiCl (R'-POCOPR = kappa(P),kappa(C),kappa(P)-(2,6-(R2PO)(2)-R-n'-C6H3-n); R = i-Pr, Ph; R-n', = H, 4-OMe, 4-COOMe, 3,5-(t-Bu)(2)). This convenient synthetic protocol involves heating a 1: 2: 1-2 mixture of resorcinol (or its substituted derivatives), R2PCl, and nickel powder in toluene (at 100 degrees C) or acetonitrile (at 75 degrees C) for 18 h. The target nickel compounds can be obtained from this procedure in up to 93% yield. Using metallic palladium in this protocol instead of nickel gives the corresponding palladium complexes in low yields only (ca. 10%).

• 出版日期2013