85277-78-7Relevant articles and documents
Stereoselective Palladium-Catalyzed C?F Bond Alkynylation of Tetrasubstituted gem-Difluoroalkenes
Ma, Qiao,Tsui, Gavin Chit,Wang, Yanhui
, p. 11293 - 11297 (2020)
A stereoselective Pd(PPh3)4-catalyzed C?F bond alkynylation of tetrasubstituted gem-difluoroalkenes with terminal alkynes has been developed. This method gives access to a great variety of conjugated monofluoroenynes bearing a tetrasubstituted alkene moiety with well-defined stereochemistry. Chelation-assisted oxidative addition of Pd to the C?F bond is proposed to account for the high level of stereocontrol. An X-ray crystal structure of a key monofluorovinyl PdII intermediate has been obtained for the first time as evidence for the proposed mechanism.
Palladium-Catalyzed Stereoselective Hydrodefluorination of Tetrasubstituted gem-Difluoroalkenes
Ma, Qiao,Liu, Caroline,Tsui, Gavin Chit
supporting information, p. 5193 - 5197 (2020/07/04)
A highly stereoselective palladium(0)-catalyzed hydrodefluorination (HDF) of tetrasubstituted gem-difluoroalkenes is developed. By using catalytic Pd(PPh3)4 (2.5-5 mol percent) and hydrosilane Me2PhSiH, various trisubstituted terminal (E)-monofluoroalkenes can be synthesized with excellent E/Z selectivity (>99:1) and good functional group tolerability. The key stereocontrol should be exerted by an ester-directed C-F bond oxidative addition step in the catalytic cycle.
Enzyme-activated irreversible inhibitors of monoamine oxidase: Phenylallylamine structure-activity relationships
McDonald,Lacoste,Bey,Palfreyman,Zreika
, p. 186 - 193 (2007/10/02)
Seventeen 2-aryl-3-haloallylamine derivatives were prepared and evaluated as inhibitors of monoamine oxidase (MAO, EC 1.4.3.4). The synthesis of these compounds was achieved from either α-methylstyrene or ring-substituted phenylacetic acid derivatives. Wi