[reaction: see text] Several dienes embedded in di- and tripeptides which incorporate proline have been prepared and subjected to ring-closing metathesis. Bicyclic peptides of well-defined amide geometry and of varying ring sizes were prepared. Several limitations of the cyclization step were revealed.
[反应:见正文]已经制备了嵌入脯
氨酸的二肽和三肽中的几种二烯,并进行了闭环复分解。制备了酰胺结构明确且环大小不同的双环肽。揭示了环化步骤的一些局限性。