Synthesis of Anacardic Acids, 6-[8(Z),11(Z)-Pentadecadienyl]salicylic Acid and 6-[8(Z),11(Z),14-Pentadecatrienyl]salicylic Acid.
作者:Mitsuru SATOH、Naoki TAKEUCHI、Takeshi NISHIMURA、Takashi OHTA、Seisho TOBINAGA
DOI:10.1248/cpb.49.18
日期:——
11-Chloro-3-methoxy-2-undecenal was synthesized from 8-bromooctanol, and an annelation reaction with this aldehyde and ethyl acetoacetate proceeded to give the ethyl 6-(8-chlorooctyl)salicylate. Ethyl 6-(8-chlorooctyl)salicylate was converted to ethyl 6-(7-formylheptyl)-2-methoxybenzoate through the iodide after protection of the phenolic hydroxyl group. Finally, the Wittig reaction with the aldehyde and triphenylphosphonium
由8-溴辛醇合成11-氯-3-甲氧基-2-十一烯醛,并与该醛和乙酰乙酸乙酯进行环化反应,得到6-(8-氯辛基)水杨酸乙酯。保护酚羟基后,通过碘化物将6-(8-氯辛基)水杨酸乙酯转化为6-(7-甲酰基庚基)-2-甲氧基苯甲酸乙酯。最后,在BuLi存在下与醛和碘化三苯基碘化进行维蒂希反应,得到甲氧基苯甲酸酯,然后用CH2Cl2中的BBr3和乙醇中的10%NaOH处理这些甲氧基苯甲酸酯,得到6-18(Z),11(Z)-十五碳二烯基水杨酸从漆树科的植物中分离出的酸(漆树酸3)和6- [8(Z),11(Z),14-十五碳三烯基]水杨酸(漆树酸4)。