Process and intermediates to prepare latanoprost.

摘要

The present invention is a novel intermediate, compound of the formula (VI)and salts thereof. In addition, the invention includes a process for the preparation of a 15(S)-prostaglandin intermediates compounds (IV) and (XVIII) which comprises (1) contacting a the corresponding enone with (-)-chlorodiisopinocampheylborane while maintaining the reaction mixture temperature in the range of from about -50° to about 0° and (2) contacting the reaction mixture of step (1) with a boron complexing agent.