present a copper-catalyzed oxidative cyclization of [small beta],[gamma]-unsaturated hydrazones, utilizing molecular oxygen as a stoichiometric oxidant. The methodology provides distinct classes of pyrazoles simply by changing the reaction solvent. Tris-substituted...
Catalytic asymmetric hydroboration of β,γ-unsaturated Weinreb amides: striking influence of the borane
作者:Sean M. Smith、Maulen Uteuliyev、James M. Takacs
DOI:10.1039/c1cc11746g
日期:——
Subtle differences in the structure of the borane strongly influence the catalytic efficiency and level of enantioselectivity in the catalytic asymmetric hydroboration of β,γ-unsaturated Weinreb amides.