M. Yamamoto et al., OXIDATIVE CYCLIZATION OF 3-HYDROXY-5-TRI(BUTYL)STANNYLPENTANOIC ACIDSTO THE CORRESPONDING DELTA-LACTONES, Synthesis, (8), 1997, pp. 937
A facile and novel 4-hydroxy-delta-lactone synthesis is described. 2-S
ubstituted 3-hydroxy-5-tri(butyl)stannylpentanoic acids were treated w
ith lead tetraacetate (LTA) for 5 minutes to give 4-hydroxy-delta-lact
ones in good yields.