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Enantioselective vinylation of aldehydes via direct catalytic asymmetric Grignard reaction of aldehdyes and the vinyl Grinard reagent is a long‐standing challenge. This work demonstrated that the magnesium (S)‐3,3′‐dimethyl BINOLate enantioselectively catalyze the direct vinylation of aldehydes with the deactivated vinylmagnesium bromide by bis(2‐[N,N′‐dimethylamino]ethyl) ether (BDMAEE) in the addition...
Cheap, energy‐saving, and applicable: With the aid of AlCl3 and BDMAEE [2,2′‐oxybis(N,N‐dimethylethanamine)], a highly asymmetric catalytic addition of various aryl Grignard reagents to aldehydes was achieved under mild conditions with easily prepared (S)‐H8‐BINOL and inexpensive commercially available Ti(OiPr)4 (see scheme), and the reaction could be easily scaled up with no loss of yield and enantioselectivity.
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