Catalytic Enantioselective Protonation of Nitronates Utilizing an Organocatalyst Chiral Only at Sulfur
作者:Kyle L. Kimmel、Jimmie D. Weaver、Melissa Lee、Jonathan A. Ellman
DOI:10.1021/ja3026196
日期:2012.6.6
highly enantioselectiveprotonation of nitronates formed upon the addition of α-substituted Meldrum's acids to terminally unsubstituted nitroalkenes is described. This work represents the firstenantioselectivecatalytic addition of any type of nucleophile to this class of nitroalkenes. Moreover, for the successful implementation of this method, a new type of N-sulfinyl urea catalyst with chirality residing
Palladium-Catalyzed Asymmetric Allylic Alkylation of Electron-Deficient Pyrroles with <i>Meso</i> Electrophiles
作者:Barry M. Trost、Maksim Osipov、Guangbin Dong
DOI:10.1021/ol3006584
日期:2012.5.4
Pyrroles can serve as competent nucleophiles with meso electrophiles in the Pd-catalyzed asymmetric allylic alkylation. The products from this transformation were obtained as a single regio- and diastereomer in high yield and enantiopurity. A nitropyrrole-containing nucleoside analogue was synthesized in seven steps to demonstrate the synthetic utility of this transformation.
Dynamic Kinetic Asymmetric Transformations of Conduritol B Tetracarboxylates: An Asymmetric Synthesis of <scp>d</scp>-<i>m</i><i>yo</i>-Inositol 1,4,5-Trisphosphate
作者:Barry M. Trost、Daniel E. Patterson、Erik J. Hembre
DOI:10.1021/ja992960v
日期:1999.11.1
Correction to Catalytic Enantioselective Protonation of Nitronates Utilizing an Organocatalyst Chiral Only at Sulfur
作者:Kyle L. Kimmel、Jimmie D. Weaver、Melissa Lee、Jonathan A. Ellman