期刊
ORGANIC & BIOMOLECULAR CHEMISTRY
卷 6, 期 22, 页码 4188-4197出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/b812551a
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资金
- Department of Science and Technology (DST), New Delhi
- Council of Scientific and Industrial Research (CSIR), New Delhi
We have developed a new technology called multi-catalysis for the sequential one-pot synthesis of highly functionalized heterocycles. A practical and novel multi-component aniline-, self- and Bronsted acid-catalyzed selective process for the sequential one-pot synthesis of highly substituted 2-(2-hydroxy-aryl)-cyclopentane-1,3-diones, 3,9-dihydro-2H-cyclopenta[b]chromen-1-ones and 3,3-dimethyl-2,3,4,9-tetrahydro-xanthen-1-ones is reported. Direct combination of aniline- and self- catalyzed cascade olefination-hydrogenation (O-H) and Bronsted acid-catalyzed cascade oxy-Michael-dehydration (OM-DH) of 1,3-diones, salicylic aldehydes and organic-hydrides is developed in one-pot to furnish the highly functionalized 3,9-dihydro-2H-cyclopenta[b]chromen-1-ones and 3,3-dimethyl-2,3,4,9-tetrahydro-xanthen-1-ones with high yields.
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