N
‐CF
3
Imidazolidin‐2‐one Derivatives via Photocatalytic and Silver‐Catalyzed Cyclizations
摘要:
AbstractWhile the N‐trifluoromethylation of cyclic ureas is of interest for the potential to fundamentally change the properties of these biologically relevant moieties, the single synthetic procedure known to date describing their access only gives 4,4‐disubstituted or fused aromatic cyclic N‐CF3 urea derivatives. We herein report an alternative approach to unleash access to the 4‐monosubstituted imidazolidinone motif. The strategy relies on straightforward cyclization of readily accessible acyclic ureas, enabled by Ag‐catalysis or light‐assisted proton coupled electron transfer. The cyclic core is shown to be highly robust and amenable to various derivatizations, such as tandem Ni‐catalysis, C−B, C−N, C−C cross couplings or C−H functionalizations, tolerating basic, nucleophilic and/or oxidizing conditions.
Synthesis and application of a new chiral monodentate spiro phosphoramidite ligand based on hexamethyl-1,1′-spirobiindane backbone in asymmetric hydroamination/arylation of alkenes
作者:Huanyu Shan、Rihuang Pan、Xufeng Lin
DOI:10.1039/c8ob01785a
日期:——
The design and synthesis of a new chiral monodentate spiro phosphoramidite ligand based on a hexamethyl-1,1′-spirobiindane scaffold has been accomplished. The ligand could serve as an elegant chiral monodentate ligand in the Pd-catalyzed asymmetric hydroamination/arylation of alkenes leading to chiral imidazolidin-2-ones with good enantioselectivities.