Discrimination of Enantiotopic Iodine Atoms by an Iodine/Magnesium Exchange Reaction
摘要:
An enantioselective iodine/magnesium exchange reaction between the diiodoalkane 4 and a chiral Grignard reagent 12 has been realized at - 78 degrees C in THE The resulting alpha-iodoalkylmagnesium reagents 13 are configurationally stable under these conditions and during trapping by a benzaldehyde/dimethylaluminium chloride system to furnish the iodohydrins 19 and epoxides 9.
Catalytic enantioselective method of consecutive Suzuki–Miyaura alkylations of gem-chloro(iodo)alkanes to form two C–C bonds in one pot transformation is described.