Dk. An et al., A concise synthesis of turneforcidine via a metalloiminium ion cyclizationterminated by the 2-(methylthio)-3-(trimethylsilyl)-1-propenyl moiety, ORG LETT, 3(19), 2001, pp. 2961-2963
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A concise synthetic route to racemic turneforcidine (1) is described that r
elies on the stereocontrolled cyclization of the 2-(methylthio)-3-(trimethy
lsilyi)-1-propenyl bearing imine 5 in the presence of TiCl4.