first time, having geometric and stereoisomeric purities of a high order. The syntheses proceed through the central intermediacy of tert-butyl (−)-3-aminocardicinate (14),which has been prepared in a biogenetically patterned, modified Mitsunobu cyclodehydration reaction of a protected L-seryl-D-(p-hydroxyphenyl)glycine dipeptide
已知的诺卡菌素 AG 已被合成,其中有几种是首次合成,具有高度的几何和立体异构纯度。合成通过 (-)-3-aminocardicate 叔丁酯 (14) 的中心中间体进行,该中间体是在受保护的 L-seryl-D-(p-羟基苯基) 甘
氨酸的
生物遗传学图案、改良的 Mitsunobu 环脱
水反应中制备的二肽