Crystallographic data and circular dichroism spectrum of lipase from Geotrichum candidum link

Diastereoselective formation of chiral 2

Diastereoselective formation of chiral 2, 2′-spirobibenz[d]chromene derivatives. Evidence from circular dichroism and crystallographic data

✍ Jacek Gawronski; Krystyna Gawronska; Andrzej Katrusiak* 📂 Article 📅 1989 🏛 Elsevier Science 🌐 French ⚖ 614 KB

Condensation of optically active ketones, (3R)-methylcyclohexanone and 5~ cholestan-3-one. with 2-hydroxy-1-naphthaldehxde\* brings about formation of chiral 2,2'-spirobiben~d]chromene derivatives with diktertoselectivity 75% and lOO%, respectively. Absolute configuration of the newly formed chiral