Tetrahedron p. 3455 - 3466 (1999)
Update date:2022-08-04
Topics:
Kamikawa, Takashi
Hayashi, Tamio
Asymmetric cross-coupling of achiral biaryl ditriflates with aryl Grignard reagents in the presence of 1 equiv of lithium bromide and 5 tool % of palladium complex PdCl2[(S)-alaphos], where alaphos stands for (2- dimethylamino)propyldiphenylphosphine, gave axially chiral monophenylation products with high enantioposition-selectivity. The remaining triflate group in the monophenylation products was substituted with carboxyl and diphenylphosphino groups through palladium-catalyzed carbonylation and diphenylphosphinylation, respectively.
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