Y. Yuasa et H. Tsuruta, PRACTICAL SYNTHESES OF (S)-4-HYDROXYTETRAHYDROFURAN-2-ONE, (S)-3-HYDROXYTETRAHYDROFURAN AND THEIR (R)-ENANTIOMERS, Liebigs Annalen, (9), 1997, pp. 1877-1879
Optically active 4-hydroxytetrahydrofuran-2-one (3) has been synthesiz
ed in good yield from optically active ethyl 4-chloro-3-hydroxybutanoa
te (2) by refluxing with dilute hydrochloric acid. In a similar manner
, optically active 3-hydroxytetrahydrofuran (5) was prepared from opti
cally active 4-chloro-1,3-butanediol (4), which was derived from 2 by
NaBH4 reduction. These new cyclizations proceed without racemization.