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Catalytic Ring-Closing Metathesis of Dienes: Application to the Synthesis of Eight-Membered Rings

✍ Scribed by Miller, Scott J.; Kim, Soong-Hoon; Chen, Zhong-Ren; Grubbs, Robert H.

Book ID
119952290
Publisher
American Chemical Society
Year
1995
Tongue
English
Weight
259 KB
Volume
117
Category
Article
ISSN
0002-7863

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## Abstract Total syntheses of allocolchicines **4** and **5**, with the ester functionality in the C‐ring at the C10 or C11 positions, is reported. An asymmetric synthesis of (7__S__)‐allocolchicine **5** is also described. The main features included the elaboration of a common intermediate, the A