1355990-15-6Relevant articles and documents
Synthesis Of Treprostinil And Intermediates Useful Therein
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, (2014/01/08)
Treprostinil is prepared by a process which involves Pauson-Khan cyclization of an an alkene-substituted, alkyne-substituted benzene corresponding to formula: (I) where PMB represents para-methoxy benzyl protecting group and R1 and R2 are alcohol protecting groups. Following cyclization, the resulting compound can be subjected to several chemical trans-formations followed by alkylation, hydrolysis and salt formation to yield treprostinil sodium. The use of para-methoxybenzyl group as the phenolic protecting group confers several process advantages that result in simplified purification of the final product and improved yields.