Preparation of a Storable Zinc Carbenoid Species and Its Application in Cyclopropanation, Chain Extension, and [2,3]-Sigmatropic Rearrangement Reactions
作者:Arnaud Voituriez、Lucie E. Zimmer、André B. Charette
DOI:10.1021/jo902618e
日期:2010.2.19
The formation of a new phosphate carbenoid (n-BuO)2P(O)OZnCH2I and its application in organozinc-mediated reactions is described. This carbenoid undergoes very slow degradation in solution and can be stored for several weeks at −20 °C. Its reactivity was tested with many representative alkenes and was determined to be a powerful cyclopropanating reagent, giving the corresponding cyclopropanes in 72−99%
Direct, Iridium-Catalyzed Enantioselective and Regioselective Allylic Etherification with Aliphatic Alcohols
作者:Satoshi Ueno、John F. Hartwig
DOI:10.1002/anie.200705267
日期:2008.2.22
An expedient preparation of chiral building blocks having levoglucosenone chromophore: a new enanticontrolled route to (–)-β-multistriatin and (+)-exo-brevicomin
2-Alkenylfurans are transformed enantioselectively into the bicyclic enones having the levoglucosenone chromophore, whose synthetic utility is demonstrated by a stereocontrolled synthesis of two insect pheromones (-)-beta-multistriatin and (+)-exo-brevicomin.