(4R)-1-Brom-4-acetoxy-2-nonyn 、
1-Brom-4-acetoxy-4-propyl-2-heptin 、 、 ethyl 7-[N-(4-acetoxy-4-propyl-2-heptynyl)methanesulfonamido]heptanoate 以The subsequent steps yield 7-[N-(4-hydroxy-4-propyl-2-heptynyl)methanesulfonamido]heptanoic acid (B) and 7-[N-(4-hydroxy-4-propyhexyl)methanesulfonamido]heptanoic acid (C)的产率得到ethyl 7-[N-(4-acetoxy-(E)-2-nonenyl)methanesulfonamido]heptanoic acid