Catalytic asymmetric synthesis of enantiopure isoprenoid building blocks: application in the synthesis of apple leafminer pheromones
作者:Ruben P. van Summeren、Sven J. W. Reijmer、Ben L. Feringa、Adriaan J. Minnaard
DOI:10.1039/b419268k
日期:——
The first catalytic asymmetric procedure capable of preparing all 4 diastereoisomers (ee > 99%, de > 98%) of a versatile saturated isoprenoid building block was developed and the value of this new method was demonstrated in itsapplication to the concise total synthesis of two pheromones.
Asymmetric synthesis of cyclo-archaeol and β-glucosyl cyclo-archaeol
作者:Catalina Ferrer、Peter Fodran、Santiago Barroso、Robert Gibson、Ellen C. Hopmans、Jaap Sinninghe Damsté、Stefan Schouten、Adriaan J. Minnaard
DOI:10.1039/c3ob27277j
日期:——
An efficient asymmetric synthesis of cyclo-archaeol and β-glucosyl cyclo-archaeol is presented employing catalytic asymmetric conjugate addition and catalytic epoxide ring opening as the key steps. Their occurrence in deep sea hydrothermal vents has been confirmed by chromatographic comparison with natural samples.
Desymmetrisation of meso-methylcyclooctanones. Highly enantioselective synthesis of C8 syn-isoprenoid and syn,syn-deoxypropionate subunits from a bicyclo[3.3.1]nonane precursor
exo,exo-3,7-dimethylbicyclo[3.3.1]nonan-9-one, the key step involving the desymmetrisation of the intermediate meso-ketones cis-3,7-dimethyl- and cis,cis-3,5,7-trimethyl-cyclooctanone through the corresponding chiral enolates generated by the lithium amide of the (+)bis[(R)-(1-phenylethylamine)]. The very high enantioselectivity observed might be related to the conformational features of the eight-membered