Application of an organozinc reagent derived from (S)-pyroglutamic acid: a formal synthesis of epibatidine
作者:Willem F.J. Karstens、Marinus J. Moolenaar、Floris P.J.T. Rutjes、Urszula Grabowska、W.Nico Speckamp、Henk Hiemstra
DOI:10.1016/s0040-4039(99)01808-0
日期:1999.12
A formal totalsynthesis of natural (−)-epibatidine has been developed. Key steps in the synthesis are a copper(I)-mediated coupling of an (S)-pyroglutamic acid-derived organozinc reagent with 1-iodo-3-trimethylsilyl-1-propyne and an N-acyl- or N-sulfonyliminium ion cyclization. Following this route, various N-protected hydroxylactams were converted into 7-azabicylo[2.2.1]heptane derivatives.