从市售化合物开始,海洋生物碱 cystodytins A-K 的全合成分五到六个步骤完成。合成的亮点包括色胺和对氢醌的氧化胺化环化以构建具有不同侧链的四环吡啶并吖啶酮环和铜(II)催化的对映选择性亨利反应以构建氧化的立体碳中心。首次将囊性素 D-I 和 K 中嵌入的立体中心的绝对构型确定为R。此外,cystodytins H 和 I 侧链中烯烃单元的立体化学从最初指定的E构型修改为Z构型。
The first chemical preparation of the cystodytins has been accomplished. A modified Knoevenagel-Stobbe pyridine formation and a photochemical nitrene insertion into a C-H bond constitute the key phases of this efficient total synthesis.
The Pyridoacridine Family Tree: A Useful Scheme for Designing Synthesis and Predicting Undiscovered Natural Products
作者:David Skyler、Clayton H. Heathcock
DOI:10.1021/np020016y
日期:2002.11.1
The pyridoacridine natural products represent a large and growing class and serve here to illustrate the wealth of information that can be extracted by comparing natural products on the basis of structure and occurrence.
KOBAYASHI, JUNICHI;CHENG, JIE-FEI;WALCHLI, MARKUS R.;NAKAMURA, HIDESHI;HI+, J. ORG. CHEM., 53,(1988) N 8, 1800-1804
作者:KOBAYASHI, JUNICHI、CHENG, JIE-FEI、WALCHLI, MARKUS R.、NAKAMURA, HIDESHI、HI+