期刊
RSC ADVANCES
卷 6, 期 115, 页码 114412-114424出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c6ra23523a
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资金
- EPSRC Centre for Doctoral Training in Molecular Modelling & Materials Science, University College London
- A*STAR Graduate Academy (A*GA), Singapore
- Engineering and Physical Sciences Research Council [1570006] Funding Source: researchfish
Domino Michael-aldol annulation of cycloalkane-1,3-diones with enals affords a general route to 6-hydroxybicyclo[ 3.3.1] nonane-2,9-diones and 2-hydroxybicyclo[3.2.1] octane-6,8-diones, notably in one-pot procedures under convenient conditions. The annulation is shown to be compatible with one or more substituents at six positions of the bicyclo[3.3.1] nonane-2,9-dione scaffold. In some cases, the relative configuration of the product can be controlled by the appropriate choice of solvent, base and temperature for the annulation. In contrast to the chair-chair conformations usually adopted, the bicyclo compounds derived from 2,4,4-trimethylcyclohexane-1,3-dione possessed boat-chair conformations. Oxidation of the annulation products gave the corresponding bicyclo triketones.
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