Action du chloroallyllithium sur les aldehydes et les cetones: synthese en une etape d'alcools β-ethyleniques γ-chlores de configuration z et d'epoxydes α-ethyleniques bi- ou tri-substitues
作者:A. Doucoure、B. Mauze、L. Miginiac
DOI:10.1016/s0022-328x(00)87068-0
日期:1982.9
Chloroallyllithium readily reacts with aliphatic and aromatic aldehydes and ketones to produce, in a one-step reaction, Z-γ-chlorinated-β-ethylenic alcohols and bi- or tri-substituted epoxides.
Palladium Pincer Complex Catalyzed Cross-Coupling of Vinyl Epoxides and Aziridines with Organoboronic Acids
作者:Johan Kjellgren、Juhanes Aydin、Olov A. Wallner、Irina V. Saltanova、Kálmán J. Szabó
DOI:10.1002/chem.200500270
日期:2005.9.5
aziridines with organoboronic acids was performed by using 0.5-2.5 mol % pincer-complex catalyst. The reactions proceed under mild conditions affording allyl alcohols and amines with high regioselectivity and in good to excellent yields. Under the applied reaction conditions aromatic chloro-, bromo- and iodo substituents are tolerated. Our results indicate that the mechanism of the pincer complex catalyzed
Synthesis of Vinyl Cyclopropanes via Anion Relay Cyclization
作者:Kevin M. Allegre、Nathan Brennan、Jon A. Tunge
DOI:10.1021/acs.orglett.8b01566
日期:2018.7.20
A method where an allylalcohol is formed from a Tsuji–Trost allylation between a vinyl epoxide and an acyl containing nucleophile is described. Subsequently, a retro-Claisen condensation is utilized as a means of through-space anion relay. The anion relay results in the formation of a reactive carbanion and simultaneously activates an allylic alcohol toward intramolecular Tsuji–Trost cyclopropanation
An iridium-catalyzed enantioselective ring-opening of alkenyl oxiranes by unactivated carboxylicacids has been developed. The reaction undergoes at ambient conditions between an in-situ-generated chiral iridium-π-allyl complex and carboxylicacids to provide rapid access to valuable alkenyl diols in high yields. The synthetic utility of this method is demonstrated by the elaboration of the products