A mild, large-scale synthesis of 1,3-cyclooctanedione: expanding access to difluorinated cyclooctyne for copper-free click chemistry
摘要:
We report the large-scale synthesis of 1,3-cyclooctanedione in five steps with 29% yield. This molecule is a synthetic precursor to difluorinated cyclooctyne, which participates in a bioorthogonal copper-free click reaction with asides. The final step demonstrates the first successful application of the Wacker-Tsuji oxidation to form a cyclic 1,3-dione. (C) 2011 Elsevier Ltd. All rights reserved.
Synthetic Applications in Radical/Radical Cationic Cascade Reactions
作者:Heiko Rinderhagen、Jochen Mattay
DOI:10.1002/chem.200304827
日期:2004.2.20
acetylenic side chain. The reactions result in bi- to tetracyclic ring systems via a fragmentation-radical/radical cationic addition reaction pathway with well defined ring juncture. The mode of cyclisation (endo/exo) can be partially controlled by addition of nucleophiles due to the suppression of radical cationic reaction pathways. Quantum chemical calculation of the cyclisation transition states underline