Lipase–triethylamine-mediated dynamic transesterification of a tricyclic acyloin having a latent meso-structure: a new route to optically pure oxodicyclopentadiene
Lipase–triethylamine-mediated dynamic transesterification of a tricyclic acyloin having a latent meso-structure: a new route to optically pure oxodicyclopentadiene
Asymmetrization of a Meso 1,2-Enediol Bis(trimethylsilyl) Ether Using a (S)-BINOL Monoisopropyl Ether(BINOL-Pri)-Tin Tetrachloride Complex: An Alternative Route to (−)-Ketodicyclopentadiene and (−)-Ketotricyclononene
作者:Takahiko Taniguchi、Kunio Ogasawara
DOI:10.1016/s0040-4039(97)01488-3
日期:1997.9
A tricyclic meso 1,2-enediol bis(trimethylsilyl) ether having an endo-tricyclo[4.2.1.02,5]nonene framework has been asymmetrically desymmetrized by protonation with a complex generated from (S)-BINOL monoisopropyl ether (BINOL-Pri) and tin tetrachloride to give the optically enriched acyloin in 90% ee. The chiral acyloin thus obtained has been transformed into two versatile chiral building blocks,