Complex Allylation by the Direct Cross-Coupling of Imines with Unactivated Allylic Alcohols
作者:Masayuki Takahashi、Martin McLaughlin、Glenn C. Micalizio
DOI:10.1002/anie.200900236
日期:2009.5.4
stereoselective: The convergent coupling of allylic alcohols with imines to deliver stereodefined homoallylic amines is described (see scheme). The process proceeds with net allylic transposition without the intermediacy of allylic organometallic reagents. Two stereodefined centers and a geometrically defined di‐ or trisubstitutedalkene are forged with high selectivity.
Highly regioselective Heck reactions of heteroaryl halides with electron-rich olefins in ionic liquid
作者:Wen Pei、Jun Mo、Jianliang Xiao
DOI:10.1016/j.jorganchem.2005.03.008
日期:2005.8
Palladium-catalyzed Heck reactions of the heteroaryl halides, halopyridines, bromoquinoline and bromothiophenes, with the electron-richolefins vinyl ethers and allyl alcohol were shown to give essentially only the branched olefins in an imidazolium ionic liquid, whereas in molecular solvents a mixture of regioisomers was formed. The method obviates the need for aryl triflates and stoichiometric inorganic
2-Oxabicyclo[2.1.1]hexanes as saturated bioisosteres of the ortho-substituted phenyl ring
作者:Aleksandr Denisenko、Pavel Garbuz、Nataliya M. Voloshchuk、Yuliia Holota、Galeb Al-Maali、Petro Borysko、Pavel K. Mykhailiuk
DOI:10.1038/s41557-023-01222-0
日期:2023.8
Here we have developed saturated bioisosteres of the ortho-substituted phenyl ring with improved physicochemical properties: 2-oxabicyclo[2.1.1]hexanes. Crystallographic analysis revealed that these structures and the ortho-substituted phenyl ring indeed have similar geometric properties. Replacement of the phenyl ring in marketed agrochemicals fluxapyroxad (BASF) and boscalid (BASF) with 2-oxabicyclo[2
Synthesis of Quaternary Carbon Centers via Hydroformylation
作者:X. Sun、K. Frimpong、K. L. Tan
DOI:10.1021/ja1036226
日期:2010.9.1
application of hydroformylation to the synthesis of quaternary carbon centers is reported. The synthesis of the highly substituted carbon is achieved by applying a catalyticamount of 1. Ligand 1 serves as a catalyticdirectinggroup by covalently and reversibly binding to both the substrate and catalyst. The intramolecular nature of the directinggroup strategy accelerates the hydroformylation reaction