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Synthetic studies on terpenoids. Part 7. Synthetic studies leading to the total synthesis of eudesmane sesquiterpenes

✍ Scribed by Banerjee, Ajoy K.; Hurtado, H�ctor E.; de Carrasco, Mar�a C.

Book ID
117999353
Publisher
Royal Society of Chemistry
Year
1982
Weight
664 KB
Category
Article
ISSN
1472-7781

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Synthetic Studies on Camptothecins. Part
Synthetic Studies on Camptothecins. Part 1 : An Improved Asymmetric Total Synthesis of (20S)-Camptothecin
✍ Li-Peng Zhang; Yong Bao; Yun-Yan Kuang; Fen-Er Chen 📂 Article 📅 2008 🏛 John Wiley and Sons 🌐 German ⚖ 148 KB

## Abstract A six‐step asymmetric total synthesis of (20__S__)‐camptothecin (**1**) has been accomplished in 25% overall yield starting from the known pyridone **3**. The key steps in this synthesis are the chemoselective Ni‐catalyzed hydrogenation of 3‐cyanopyridone **6** to 3‐formylpyridone **7**