[EN] FLUORINATION PROCESS [FR] PROCÉDÉ DE FLUORATION
摘要:
The present disclosure relates to processes for the fluorination of molecules. One aspect provides a process for incorporating a fluorine atom into a molecule, said process comprising converting a compound of formula X—SG into a compound of formula X—F, wherein G is an optionally substituted C1-C6alkyl group, an optionally substituted aryl group, or an optionally substituted heteroaryl group, and X is an organic group; and wherein the SG group is attached to a secondary or tertiary carbon atom in the organic group X; said process comprising treating said compound of formula X—SG with (i) an activator compound selected from the group consisting of N-halosuccinimides, N-halobenzenesulfonimides, N-halobenzenesulfonamides, dialkylaminodihalosulfinium salts, heterocyclylaminodihalosulfinium salts, dialkylaminosulfur trihalides, XeF2, difluoroiodotoluene, di-and tri-bromoisocyanuric acids, bromine, chlorine, hypervalent iodine compounds with I2; and other sources of Br+, Cl+, F+, l+, bromonium, iodonium, or chloronium; and (ii) a source of fluoride. Uses of the process in the preparation of various fluorinated molecules as well as uses of certain compounds as intermediates in the processes of the present disclosure are also provided.
nest: The first thiocarboxylation of styrenes and acrylates with CO2 to generate important β-thioacids was realized by using visible light as a driving force and catalytic iron salts as promoters. This multicomponentreaction features broad substrate scope, mild reaction conditions, and high regio-, chemo-, and diasteroselectivity. Mechanistic studies indicate that a radical pathway can account for the