Preparation of the 15,6α-lactone from 8β,13βH-tetrahydroabietic acid
Abstract
Photolysis of the amide (2) of the title acid in the presence of lead tetra-acetate and iodine gave 8β,13βH-tetra-hydroabietan-15-yl isocyanate (3) and a compound identified as 8β,13βH-tetrahydroabietane-15,6α-carbolactone (11).