position. Reported herein is a total synthesis of SEA. The key to our synthesis lies in a Mukaiyama aldol condensation reaction of silyl enol ether with glyoxylate in the presence of an anhydrous fluoride reagent, [Bu4N][Ph3SnF2], which directly constructs the crucial C−C bond at the C11 position in SEA. The NaVCh‐inhibitory activities of SEA and its derivatives were evaluated by means of cell‐based assay
11-Saxitoxinethanoic acid(
SEA)是麻痹性贝类毒素的saxitoxin(STX)家族的成员,并且在C11位置包含一个异常的C-C键。本文报道的是
SEA的全合成。合成的关键在于在无
水氟化物试剂[Bu 4 N] [Ph 3 SnF 2 ]的存在下,甲
硅烷基烯醇醚与
乙醛酸酯的Mukaiyama醇醛缩合反应,该化合物直接在C上形成关键的C-C键。 C11在
SEA中的位置。通过基于细胞的分析评估了
SEA及其衍
生物的Na V Ch抑制活性。
SEA的IC 50值为(47±12)n m,大约是脱
氨甲酰基STX(dcSTX)的两倍。