Palladium-Catalyzed Oxidative Intermolecular Difunctionalization of Terminal Alkenes with Organostannanes and Molecular Oxygen
作者:Kaveri Balan Urkalan、Matthew S. Sigman
DOI:10.1002/anie.200900218
日期:2009.4.14
palladium complex catalyzes the title transformations, which are thought to proceed via a π‐allyl or π‐benzyl intermediate. The regioselectivity of the reaction (1,2‐ or 1,1‐difunctionalization) depends on the type of terminal double bond (conjugated or nonconjugated) in the substrate (see scheme) and appears to be controlled by the relative rates of β‐hydride elimination and transmetalation. DMA=dimethylacetamide
Modular and Fast Synthesis of Versatile Secondary α,α‐Dialkyl Boronates via Deoxygenative Alkylboration of Aldehydes
作者:Wenhao Xu、Purui Zheng、Jun Zhou、Zihao Hu、Tao XU
DOI:10.1002/anie.202214213
日期:2022.12.5
Secondaryα,α-dialkyl boronates are widely used derivatives due to their great versatility. Herein, we report an unprecedented method to access those products directly from the deoxygenativealkylboration of aldehydes. A sequence of difunctionalization can be achieved smoothly from the readily available aldehydes instead of commonly used alkenes in only two steps.