Total synthesis of the cytotoxic macrocycle (+)-hitachimycin
作者:Amos B. Smith、Thomas A. Rano、Noritaka Chida、Gary A. Sulikowski、John L. Wood
DOI:10.1021/ja00047a008
日期:1992.10
The first totalsynthesis of the antitumor antibiotic (+)-hitachimycin (a.k.a. stubomycin) (1) has been achieved in 22 steps and 1.1% overall yield. The cornerstone of the synthetic strategy was a highly stereoselective three-component coupling of (-)-5-methoxycyclopentenone (4) with a zincate derived from vinyl iodide 3a and aldehyde (-)-51
A Facile, Efficient Synthesis of 2-substituted-4-Hydroxy- 2-cyclopenten-1-ones
作者:P. G. Baraldi、G. P. Pollini、D. Simoni、V. Zanirato、A. Barco、S. Benetti
DOI:10.1055/s-1986-31779
日期:——
A simple procedure for the transformation of 2-substituted 4-bromo-2-cyclopenten-1-ones into the title compounds as well as into the corresponding 4-methoxy derivatives is described.
Total Synthesis, Relay Synthesis, and Structural Confirmation of the C18-Norditerpenoid Alkaloid Neofinaconitine
作者:Yuan Shi、Jeremy T. Wilmot、Lars Ulrik Nordstrøm、Derek S. Tan、David Y. Gin
DOI:10.1021/ja4064958
日期:2013.9.25
skeleton 33 of the aconitine alkaloids. Key endgame transformations include the installation of the C8-hydroxyl group via conjugate addition of water to a putative strained bridghead enone intermediate 45 and one-carbon oxidative truncation of the C4 side chain to afford racemic neofinaconitine. Complete structural confirmation was provided by a concise relay synthesis of (+)-neofinaconitine and (+)-9-deoxylappaconitine