Synthesis of Tetrasubstituted and Functionalized Enol Ethers by E-Selective Olefination of Esters with Ynolates
摘要:
We have developed the E-selective olefination of ester carbonyls to afford tetrasubstituted, functionalized olefins and the C-S insertion of thiol esters to give beta-keto thiol esters via ynolates.
We have developed the E-selective olefination of ester carbonyls to afford tetrasubstituted, functionalized olefins and the C-S insertion of thiol esters to give beta-keto thiol esters via ynolates.
Acid-Catalyzed Nazarov Reaction Controlled by β-Alkoxy Groups
Acid-catalyzed Nazarov reaction of β-alkoxy divinyl -ketones providing 5-oxycyclopent-2-enones has been developed. The effects of the β-alkoxy group on the catalyst efficiency and the regioselectivity are based on the stabilization of the intermediates and the spontaneous elimination of the group followed by trapping. The substrates are easily accessible using the torquoselective olefination of esters with ynolates