Chemical and Pharmaceutical Bulletin p. 957 - 959 (1994)
Update date:2022-09-26
Topics:
Fuji
Tanaka
Ahn
Mizuchi
The Grignard reactions of mono-benzoylformate ester of 1,1'-binaphthalene-2,2'-diol were examined to investigate the complex-induced proximity effect of the phenolic hydroxyl at C-2' under different reaction conditions. This hydroxyl group exerted a significant neighboring group participation in the reaction. The nucleophilic addition reaction proceeded with higher diastereoselectivity than that of a series of sterically similarly sized binaphthyl esters recently reported. The halogen ligand in methyl Grignard reagents plays a crucial role in controlling the degree and sense of diastereoselectivity. A plausible mechanism is also proposed.
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