the synthesis of fluorinatedcompounds have been intensively studied, recently. Development of practical fluorinating reagents is indispensable for this purpose. Herein, bench-stable electrophilic fluorinating reagents were synthesized as N-fluorobenzenesulfonimide (NFSI) substitutes. Reagents obtained by replacing one of the NFSI sulfonyl groups with an acyl group led to the highly selective monofluorination
The synthesis of monofluoroalkenes bearing a malonate or its derivatives at the β position is presented. The reaction can be performed with various 3,3-difluoropropenes. A preliminary result for an enantioselective variant is also reported. Further synthetic transformations of a monofluoroalkene were also accomplished.
Activation of Allylic CF bonds: Palladium-Catalyzed Allylic Amination of 3,3-Difluoropropenes
作者:Xavier Pigeon、Maxime Bergeron、Francis Barabé、Pascal Dubé、Heather N. Frost、Jean-François Paquin
DOI:10.1002/anie.200904747
日期:2010.2.1
keep one! A wide range of cyclic and acyclic β‐aminofluoroalkenes are prepared by the title reaction. The key fluorinated palladium π‐allyl intermediate is generated using a catalytic allylic CF bond activation.
Enantioselective palladium-catalyzed addition of malonates to 3,3-difluoropropenes
作者:Myriam Drouin、Jean-François Paquin
DOI:10.1016/j.tet.2018.08.034
日期:2018.10
Monofluoroalkenes bearing a malonate unit at the β position can be synthesized by the enantioselectiveaddition of diesters to 3,3-difluoropropenes. The difference in reactivity regarding the geometry and the substituents of the alkene of the 3,3-difluoropropenes, as well as the alkyl groups of the malonates, was studied and limitations were identified. The reaction was also performed with different
The first highlyenantioselective CuI‐catalyzed azide‐alkyne cycloaddition (CuAAC) of tertiaryalcohols and their kineticresolution is reported. This approach allows facile access to multifunctional tertiaryalcohols featuring an α‐ethynyl or α‐triazole moiety, and represents the first successful kineticresolution of racemates with a tetrasubstituted carbon stereocenter via CuAAC. Newly developed