243. Q. Perron, A. Alexakis,
     “Copper-catalysed asymmetric addition of diethylzinc to Boc-protected imines”
     Tetrahedron: Asymmetry 2008, 19, 1871-1874.

A new class of substrates has been tested in the addition of Et₂Zn, catalyzed by copper and phosphoramidite, providing the expected α branched protected amine in quantitative conversion, good yield and excellent enantioselectivity up to 97%.

DOI : 10.1016/j.tetasy.2008.07.020 

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