Kb. Anderson et al., PREPARATION OF DEHYDROABIETIC ACID AND DIHYDROABIETIC LACTONE BY DISPROPORTIONATION OF TALL OIL ROSIN WITH TRIFLUOROACETIC-ACID, Synthetic communications, 28(8), 1998, pp. 1375-1380
Dehydroabietic acid 2 and ''dihydroabietic lactone'' 3 together with a
n oily mixture of three saturated lactones 4 epimeric with 3 were obta
ined when Tall Oil diene resin acids (e.g, abietic acid) were dispropo
rtionated with trifluoroacetic acid.