Total Synthesis of (−)-Rhazinilam: Asymmetric C−H Bond Activation via the Use of a Chiral Auxiliary
作者:James A. Johnson、Ning Li、Dalibor Sames
DOI:10.1021/ja026130k
日期:2002.6.1
(-)-rhazinilam was synthesized in three major steps, namely the pyrrole synthesis, selective C[bond]H bond activation, and direct macrolactam formation. The key step involved asymmetric C[bond]H bond functionalization (dehydrogenation) of the diethyl group segment in intermediate 6. This was achieved by the attachment of chiral platinum complexes to the proximal nitrogen atom. A high degree of selectivity
抗肿瘤剂 (-)-rhazinilam 在三个主要步骤中合成,即吡咯合成、选择性 C[键]H 键活化和直接大环内酰胺形成。关键步骤涉及中间体 6 中二乙基段的不对称 C[键]H 键官能化(脱氢)。这是通过将手性铂配合物连接到近端氮原子上来实现的。通过使用恶唑啉基酮手性助剂实现了高度的选择性 (60-75% ee)。