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Synthesis of 326E and 326Z. Condition: a) PPTS, DHP, DCM. b) n-BuLi, HMPA,THF. c) TsOH, MeOH. d) CBr4, PPh3, DCM. e) ethyl isobutyrate, LDA, THF. f) H2, Ni(OAc)2, NaBH4, ethylene diamine, EtOH. g) KOH, EtOH, H2O. h) LiAlH4, Ethylene glycol diethyl ether.
