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Kinetic Resolution of Racemic Lactones by Conjugate Additions of Allylic Organolithium Species:  Direct Formation of Three Contiguous Centers with High Diastereo- and Enantioselectivities

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journal contribution
posted on 18.07.2002, 00:00 by Sung H. Lim, Peter Beak
Kinetic resolution of racemic α,β-unsaturated lactones by the organolithium species produced from asymmetric lithiation of N-Boc-N-(p-methoxyphenyl)cinnamylamine provides conjugate addition products with three contiguous stereogenic centers in yields of 62−77% with diastereomeric ratios from 75:25 to >99:1 and enantiomeric ratios for the major diastereomers from 94:6 to 98:2.