| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 5229693 | Tetrahedron | 2006 | 7 Pages |
Abstract
The TiCl4-mediated [3+3] cyclization of 2,4-bis(trimethylsilyloxy)penta-1,3-diene with 3-silyloxyalk-2-en-1-ones afforded 2-acetylphenols, which were transformed into functionalized chromones. The Me3SiOTf-mediated condensation of the latter with 1,3-bis(silyl enol ethers) and subsequent domino 'retro-Michael-aldol-lactonization' reaction afforded 7-hydroxy-6H-benzo[c]chromen-6-ones.
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Physical Sciences and Engineering
Chemistry
Organic Chemistry
![Synthesis of 7-hydroxy-6H-benzo[c]chromen-6-ones based on a '[3+3] cyclization/domino retro-Michael-aldol-lactonization' strategy](/preview/png/5229693.png "First Page Preview: Synthesis of 7-hydroxy-6H-benzo[c]chromen-6-ones based on a '[3+3] cyclization/domino retro-Michael-aldol-lactonization' strategy")
Authors
Ehsan Ullah, Bettina Appel, Christine Fischer, Peter Langer,