(4 (S) under bar,4a (R) under bar)-Neonepetalactone (6) was synthesized in high diastereomeric and enantiomeric purity (de, ee greater than or equal to 96%) in a four step procedure. Key step of the total synthesis is the Michael addition of metalated propanal SAMP-hydrazone (((S) under bar)-1) to 2-cyclopentenecarboxylate (2).
(4(S)、4a(R)-Neonepetalactone(6)通过四步合成过程,在高非对映异构体和对映体纯度(de, ee ≥ 96%)下成功合成。该化合物的总合成关键步骤是
金属化的
丙酮醛SAMP-腙((S)-1)与
环戊烯羧酸酯(2)之间的迈克尔加成反应。