Synthesis of statine from (S)-malic acid; stereocontrol via radical cyclization
作者:Wim-Jan Koot、Roel van Ginkel、Mirko Kranenburg、Henk Hiemstra、Saskia Louwrier、Marinus J. Moolenaar、W.Nico Speckamp
DOI:10.1016/s0040-4039(00)92639-x
日期:1991.1
Highly stereoselective syntheses of enantiomerically pure γ-amino acids statine and 4-epi-statine from (S)-malicacid are described by using, respectively, an intramolecular α-acylamino radical reaction and an intermolecular N-acyliminium allylsilane coupling.
A Cu-catalyzedasymmetric kinetic boron conjugate addition of γ-substituted α,β-unsaturated γ-lactams followed by oxidation is reported with good results. This strategy provides an efficient access to valuable enantioenriched α,β-unsaturated γ-lactams bearing simple γ-alkyl or aryl substituents, which showed inhibitory activities against cisplatin-sensitive ovarian cancer cells A2780. A new Lewis acid