Total Synthesis of (−)-5,6,11-Trideoxytetrodotoxin and Its 4-Epimer
Organic Letters2006Vol. 8(21), pp. 4971–4974
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Taiki Umezawa, Toshihiro Hayashi, Hiroshi Sakai, Hidetoshi Teramoto, Takeshi Yoshikawa, Masashi Izumida, Yoshinori Tamatani, Tadashi Hirose, Yasufumi Ohfune, Tetsuro Shinada
Abstract
[reaction: see text] The first total synthesis of 5,6,11-trideoxytetrodotoxin (1) and its 4-epimer were achieved. The synthesis is characterized by the stereoselective construction of the quaternary amino carbon center at C8a by an asymmetric transferring Strecker synthesis and the highly efficient conversion of cyanohydrin 4 to 1 via intramolecular cyclization reactions.
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