An entirely new methodology for making the required pyranophthoquinones as illustrated by an efficient total synthesis of cryptosporin (1) via cycloaddition of isoquinolinium salt 2 with L-fucal 3 is reported. Natural cryptosporin must have the 2R,3R,4R configuration, enentiomeric to formula 1
报道了一种用于制备所需
吡喃邻苯醌的全新方法,如通过
异喹啉盐 2 与 L-fucal 3 环加成有效全合成隐孢菌素 (1) 所示。天然隐孢菌素必须具有 2R、3R、4R 构型,与式 1 对映异构