An expeditious total synthesis of kalkitoxins: determination of the absolute stereostructure of natural kalkitoxin
作者:Fumiaki Yokokawa、Toshinobu Asano、Tatsufumi Okino、William H. Gerwick、Takayuki Shioiri
DOI:10.1016/j.tet.2004.06.014
日期:2004.8
Kalkitoxin, a potent neurotoxin isolated from the marine cyanobacteria Lyngbya majuscula, and its congeners (1–7) were efficiently synthesized utilizing Hruby's diastereoselective 1,4-addition and the Wipf's oxazoline-thiazoline conversion as key steps. These synthetic efforts in combination with spectral studies of natural kalkitoxin clearly determined the absolute stereostructure of kalkitoxin to
Kalkitoxin,一种强效神经毒素从海洋蓝细菌分离鞘丝藻majuscula,其同类物(1 - 7)被有效地合成利用Hruby的非对映选择性1,4-加成和Wipf的恶唑啉噻唑啉转化为关键步骤。这些合成的努力与自然kalkitoxin的光谱研究相结合,明确确定kalkitoxin的绝对立体结构为7。