作者:Staffan Torssell、Emil Wanngren、Peter Somfai
DOI:10.1021/jo070498o
日期:2007.5.1
A stereocontrolled total synthesis of (−)-stemoamide (1) is presented. The synthesis starts from commercially available (S)-pyroglutaminol (4). A chemoselective iodoboration of 5 was used to access key intermediate 3. The β,γ-unsaturated azepine derivative 2 was obtained via a Pd(0)-catalyzed sp2−sp3 Negishi cross-coupling using a Reformatsky nucleophile followed by a ring-closing metathesis reaction
提出了立体控制的(-)-硬脂酰胺(1)的全合成。合成从可商购获得的(S)-焦谷氨醇(4)开始。5的化学选择性碘硼化用于访问关键中间体3。通过使用Reformatsky亲核试剂通过Pd(0)催化的sp 2 -sp 3 Negishi交叉偶联,然后进行闭环易位反应,获得了β,γ-不饱和氮杂环庚烷衍生物2。所需的C8-C9反式立体化学值为1,可通过立体选择性溴内酯化/ 1,4-还原序列获得。