New optically active 8-hydroxy-3-alk(en)yl-3,4-dihydroisocoumarins 2a–c were isolated from Ginkgo biloba L. fruits. The absolute configuration was determined to be R by comparison with both enantiomers of the 8-hydroxy-3-tridecyl-3,4-dihydroisocoumarin synthesized from optically active epichlorhydrins.
Synthesis of Aculeatins A and B via Iterative Hydrolytic Kinetic Resolution
作者:Pradeep Kumar、Anand Harbindu
DOI:10.1055/s-0029-1218687
日期:2010.5
A simple and concise approach for the synthesis of aculeatins A and B starting from (+/-)-epichlorohydrin is described. The synthetic strategy features Jacobsen's hydrolytic kinetic resolution and a Linchpin coupling as key steps.