Ring Closing Metathesis for the Asymmetric Synthesis of (S)-Homopipecolic Acid, (S)-Homoproline and (S)-Coniine
作者:Stephen G. Davies、Keiji Iwamoto、Christian A. P. Smethurst、Andrew D. Smith、Humberto Rodriguez-Solla
DOI:10.1055/s-2002-32580
日期:——
Diastereoselective conjugate addition of lithium (S)-N-allyl-N-α-methylbenzylamide to α,β-unsaturated esters or Weinreb amides, followed by ring closing metathesis is used to afford the cyclic β-amino acids (S)-homopipecolic acid and (S)-homoproline and the amine (S)-coniine in high ee.
Asymmetric synthesis of cyclic β-amino acids and cyclic amines via sequential diastereoselective conjugate addition and ring closing metathesis
作者:Ann M Chippindale、Stephen G Davies、Keiji Iwamoto、Richard M Parkin、Christian A.P Smethurst、Andrew D Smith、Humberto Rodriguez-Solla
DOI:10.1016/s0040-4020(03)00411-3
日期:2003.4
β-unsaturated esters followed by ringclosingmetathesis is used to afford efficiently a range of substituted cyclic β-amino esters in high d.e. Alternatively, conjugate addition to α,β-unsaturated Weinreb amides, functional group conversion and ringclosingmetathesis affords cyclic amines in high d.e. The further application of this methodology to the synthesis of a range of carbocyclic β-amino esters via