Stereoselectivity of Nitrile Oxide Cycloadditions to Chiral Allylic Fluorides: Experiment and Theory
作者:Michael Prakesch、Danielle Grée、René Grée、Jennifer Carter、Ilyas Washington、K. N. Houk
DOI:10.1002/chem.200304967
日期:2003.11.21
The cycloadditions of nitrileoxides with new and previously studied allylic fluorides were examined. The 1,3-dipolar cycloaddition reactions were also investigated theoretically with density functional theory (B3LYP) based transition-state modelling. The predictions provided reasonable agreement with experiment, indicating that both steric and electronic effects have important influences on the stereoselectivities
Remote Fluorination of α,β‐Unsaturated Carbonyls via Silyl Dienol Ethers
作者:Daria V. Galaktionova、Sara Y. Siddiqui、Justin T. Mohr
DOI:10.1002/chem.202400493
日期:2024.5.8
readily prepared from simple ketones and aldehydes. The transformation displays broad scope including 27 cyclic and acyclic siloxydienes providing γ-fluoro compounds in 28–91 % yield. Notably, the reported conditions are also suitable for the synthesis of challenging tertiary fluorides. The regioselectivity of the reaction was studied on a series of acyclic siloxydienes and was observed to be sensitive