Highly Selective β-Hydride Elimination in Pd-Catalyzed Decarboxylative Heck-Type Reaction
摘要:
A variety of beta-aryl ketones and aldehydes were facilely synthesized via a Pd(II)/Ag2CO3-mediated decarboxylative Heck type reaction between readily available benzoic acid derivatives and allylic alcohols under mild conditions. The control experiments indicated that this transformation may proceed via a hydrogen migration process.
Palladium(II)-Catalyzed Decarboxylative Heck Arylations of Acyclic Electron-Rich Olefins with Internal Selectivity
作者:Ashkan Fardost、Jonas Lindh、Per J. R. Sjöberg、Mats Larhed
DOI:10.1002/adsc.201301004
日期:2014.3.10
electron‐rich olefins are still lacking. We herein report on palladium(II)‐catalyzed decarboxylative Heck arylations of linear electron‐rich olefins with excellent selectivity for the internal position. The method allows a variety of electron‐rich linear olefins to undergo arylation with ortho‐functionalized aromatic carboxylic acids, including heterocycles. The reaction mechanism has been explored with ESI‐MS
A variety of beta-aryl ketones and aldehydes were facilely synthesized via a Pd(II)/Ag2CO3-mediated decarboxylative Heck type reaction between readily available benzoic acid derivatives and allylic alcohols under mild conditions. The control experiments indicated that this transformation may proceed via a hydrogen migration process.
Nickel‐Catalyzed Regio‐ and Enantioselective Migratory Hydrocyanation of Internal Alkenes: Expanding the Scope to α,ω‐Diaryl Internal Alkenes
involving a chain-walking process is reported. The reaction exhibits excellent regio- and enantioselectivity, proceeds under mild reaction conditions, and delivers benzylic nitriles in high yields. Even α,ω-diaryl internal alkenes could be successfully converted to the desired products with good regio- and stereoselectivity by modifying the electronic and steric effects.