Anti‐headache chemistry: In the presence of a tailored modular P,P ligand the nickel‐catalyzed addition of HCN, generated in situ from TMS‐CN, to styrene derivatives proceeds with an unprecedented level of stereocontrol (up to 97 % ee) to give 2‐aryl‐acetonitriles, for example, the depicted precursor of Ibuprofen.
Caesium fluoride-mediated hydrocarboxylation of alkenes and allenes: scope and mechanistic insights
作者:Ashot Gevorgyan、Marc F. Obst、Yngve Guttormsen、Feliu Maseras、Kathrin H. Hopmann、Annette Bayer
DOI:10.1039/c9sc02467k
日期:——
A caesium fluoride-mediated hydrocarboxylation of olefins is disclosed that does not rely on precious transition metal catalysts and ligands. The reaction occurs at atmospheric pressures of CO2 in the presence of 9-BBN as a stoichiometric reductant. Stilbenes, β-substituted styrenes and allenes could be carboxylated in good yields. The developed methodology can be used for preparation of commercial