Domino Recombinant γ-Isomerization and Reverse Wacker Oxidation of γ-Vinyl-γ-butyrolactone: Synthesis of (+)-<i>trans-</i>, (-)- and (+)-Disparlures
作者:Venkati Bethi、Pullaiah Kattanguru、Rodney A. Fernandes
DOI:10.1002/ejoc.201400021
日期:2014.5
A domino palladium-catalyzed recombinantγ-isomerization and reverseWackeroxidation of γ-vinyl-γ-butyrolactone has been explored. The strategy has been used in the stereoselective synthesis of (+)-trans-, (–)- and (+)-disparlures. The synthesis was achieved in seven to eight steps from D-glucono-δ-lactone with overall yields of 19.3, 20.7 and 22.6 %, respectively.
An expedient enantioselective synthetic approach for the gypsy moth sex-attractant pheromone cis-(+)-1 and trans-(+)-disparlure 2 is described employing the optimized combination of organocatalytic MacMillan’s self aldol reaction, Wittig olefination, regioselective ring opening of an epoxide and Mitsunobu esterification reactions as key steps.
A new approach to the synthesis of optically active disparlures — Attractants ofPorthetria dispar
作者:U. M. Dzhemilev、R. N. Fakhretdinov、A. G. Telin、G. A. Tolstikov、D. V. Amirkhanov、V. P. Krivonogov
DOI:10.1007/bf00565169
日期:1981.9
A fairly simple and original one-stage method of obtaining opticallyactive attractants ofPorthetria dispar-(+)- and (-)-2-methyl-Z- and E-7,8-epoxyoctadecanes has been developed. The synthesis is based on the epoxidation of 2-methyloctadec-Z-and -E-7-enes by chiral peroxide complexes of molybdenum of the type of MoO3-L* in an organic solvent at room temperature. Derivatives of tartaric, lactic, β-aminopropionic
Organocatalyzed epoxidation in the total synthesis of (−)-<i>trans</i>-, (+)-<i>trans</i>- and (+)-<i>cis</i>-disparlures
作者:Ajay Sharma、Satyendra Kumar Pandey
DOI:10.1039/d2ob02195a
日期:——
organocatalyzed synthetic approach for the synthesis of (−)-trans-, (+)-trans- and (+)-cis-disparlures has been described. The pivotal reaction sequence comprises organocatalyzed asymmetric Jørgensen epoxidation, Wittig olefination, migration of epoxide and Mitsunobu inversion reaction. Excellent enantiomeric purity (≥99%) was achieved during the synthesis of disparlure enantiomers by the Jørgensen