The use of endothiodipeptide anilides, which were obtained in high yields by a variation of the ‘azirine/oxazolone method’, for the synthesis of longer endothiopeptides is described. With this novel methodology, epimerically pure endothiopeptides with the thiocarbonyl group next to the bulky Aib were prepared in satisfactory yields. The structures of two endothiotripeptides and one endothiotetrapeptide
描述了通过改变“
叠氮基/
恶唑酮法”以高收率获得的内
硫代二肽
苯胺用于更长的内
硫代肽的合成。用这种新颖的方法,以令人满意的收率制备了具有疏基羰基的差向异构体纯的内
硫肽,紧挨着大体积的Aib。通过单晶X射线晶体学建立了两个内
硫三肽和一个内
硫四肽的结构。