Synthesis and [4 + 2]-Annulation of Enantioenriched (<i>Z</i>)-Crotylsilanes: Preparation of the C1−C13 Fragment of Bistramide A
作者:Jason T. Lowe、James S. Panek
DOI:10.1021/ol050982i
日期:2005.7.1
stereochemically complementary pyrans (relative to (E)-crotylsilanes) bearing 2,6-cis-5,6-cis and 2,6-trans-5,6-cis relationships of peripheral functionalities. A stereoselective synthesis of the C1-C13 fragment of bistramide A is also described highlighting this annulation strategy.
[反应:请参见文字]。具有高对映体纯度的新型手性巴豆基硅烷具有(Z)-烯烃的几何形状。试剂与醛一起参与[4 + 2]环化反应,生成立体化学互补的吡喃(相对于(E)-巴豆基硅烷),带有2,6-顺式-5,6-顺式和2,6-反式-5,6-外围功能的顺式关系。还描述了双链酰胺A的C 1 -C 13片段的立体选择性合成,突出了该环化策略。