Dispiroketals in synthesis (part 4): Enantioselective desymmetrization of glycerol using a c2-symmetric disubstituted bis-dihydropyran.
作者:Boons Geert-Jan、David A. Entwistle、Steven V. Ley、Martin Woods
DOI:10.1016/s0040-4039(00)73906-2
日期:1993.8
Glycerol may be simultaneously protected and enantioselectively desymmetrised by dispiroketal formation with (S,S)-2,2′-dimethyl-3,3′,4,4′-tetrahydro- 6,6′-bi-2H-pyran 1.
A marine prostanoid, punaglandin4 has been synthesized from 1,2-bis-trimethylsilyloxycyclopentene () via rearrangement of the allylic methanesulfonate as a key step.
Aromatic retinoids (part 2): A short and convenient route to 5-(5,6,7,8-tetrahydro-5,5,8,8-tetramethyl-2-anthracenyl)-2-furan and -2-thiophene carboxylic acids.