Synthesis of a novel prostaglandin containing heteroatoms in the ring cyclopentane

A novel prostaglandin analogue, n-heptyl-4-(3-hydroxy-trans-1-octenyl)-1,3-thiazolidin-2-thione, containing heteroatoms in the ring has been synthesized. The key step in the synthesis was the preparation of the five-membered ring starting from of l-cysteine ethyl ester hydrochloride.