Chemistry Letters p. 465 - 466 (1989)
Update date:2022-07-30
Topics:
Yoda, Hidemi
Takabe, Kunihiko
A new strategy to the synthesis of (S)-(-)-chroman-2-carboxylic acid, a pivotal intermediate possessing the absolute configuration required for the construction of α-tocopherol, was disclosed by utilizing asymmetric halolactonization of acylproline.Debromination followed by acidic hydrolysis directly afforded the title compound in 98percent enantiomer excess.
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