中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
—— | ethyl 6-oxohex-2-enoate | 26392-27-8 | C8H12O3 | 156.181 |
二乙基辛-2,6-二烯二酸酯 | octa-2,6-dienedioic acid diethyl ester | 15898-58-5 | C12H18O4 | 226.273 |
—— | (E)-ethyl 6-bromohex-2-enoate | 71032-10-5 | C8H13BrO2 | 221.094 |
Hydroxy-α-sanshool was synthesized in a 13% overall yield through eight steps, which included two Wittig reactions that were used to form the carbon skeleton with ethyl 2-oxoacetate and 2 E,4 E-hexadienal being reacted with the appropriate ylides. Impurities in the processes could easily be separated. Ethyl 6-hydroxy-2Z-hexenoate was converted to its E-isomer with catalysis by I2 and 2E,6Z,8E,10E-dodecatetraenoic acid was crystallized from a solution in 1% ethyl acetate in n-hexane.