The Preparation of Nonracemic Secondary α-(Carbamoyloxy)alkylzinc and Copper Reagents. A Versatile Approach to Enantioenriched Alcohols
Julien P. N. Papillon and Richard J. K. Taylor*
*Department of Chemistry, University of York, Heslington, York, YO10 5DD, U.K., Email: rjkt1york.ac.uk
J. P. N. Papillon, R. J. K. Taylor, Org. Lett., 2002, 4, 119-122.
Chiral α-(carbamoyloxy)alkylcopper reagents, prepared using Hoppe's sBuLi/(-)-sparteine methodology and subsequent transmetalations with ZnCl2 and CuCN, reacted with various electrophiles to give enantiomerically pure alcohols after deprotection.
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Alcohols, Homoallylic Alcohols, Carbamates