Abstract
We describe here a four-step semisynthetic method for the preparation of enantiomerically pure (-)-enterolactone starting from the readily available lignan hydroxymatairesinol from Norway spruce (Picea abies). Hydroxymatairesinol was first hydrogenated to matairesinol. Matairesinol was esterified to afford the matairesinyl 4,4'-bistriflate, which was deoxygenated by palladium-catalyzed reduction to 3,3'-dimethylenterolactone. Demethylation of 3,3'-dimethylenterolactone and reduction with LiAlH4 yielded (-)-enterolactone and (-)-enterodiol, respectively.
Original language | Undefined/Unknown |
---|---|
Pages (from-to) | 491–493 |
Number of pages | 3 |
Journal | Organic Letters |
Volume | 5 |
Issue number | 4 |
DOIs | |
Publication status | Published - 2003 |
MoE publication type | A1 Journal article-refereed |