Stereoselective Total Synthesis of Obolactone via Prins Cyclization

In the experimental procedures, for compounds 6, 9, 10, 11, 12, 13 and 14, the C-4 stereochemistry was given as ‘S’, but it should be ‘R’ and for compound 5, the C-4 stereochemistry was given as ‘R’, but it should be ‘S’.