Journal of the Chemical Society. Chemical communications p. 687 - 688 (1992)
Update date:2022-08-29
Topics:
Tamai, Yasufumi
Akiyama, Masahiro
Okamura, Atsuko
Miyano, Sotaro
An efficient asymmetric synthesis of a butan-4-olide having a quarternary asymmetric carbon centre was achieved with up to 97percent enantiomeric excess (e.e.) by the 1,7-asymmetric inductive addition of Grignard reagents to the γ-keto esters 4-7, the e.e. of which was highly dependent on the structure of the chelating group of the chiral auxiliaries 1-3.
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