Abstract
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p-Toluenethiol/oxygen co-oxidation of 5-methylhepta-1,3,6-triene (1) gives inter alia only one (6a) of four possible diastereoisomeric dioxolanes, and the threo- and erythro- isomers of the 1,4-addition product (10, 11). The variation in relative yields with thiol concentration indicates that coupling of the allylic radical (2) with oxygen is reversible. © 1983.