期刊
ORGANIC & BIOMOLECULAR CHEMISTRY
卷 14, 期 2, 页码 623-630出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c5ob01656h
关键词
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资金
- Ministry of Trade, Industry, and Energy
- Korea Institute of Energy Technology Evaluation and Planning [N0000582]
In this study, we executed an effective and novel enantioselective Michael/cyclodehydration sequential reaction between pyrazolin-5-one (or 4-hydroxy-2-pyrone) and chalcones that is catalyzed by a quinine-derived primary amine L7 in the presence of Boc-D-Phg-OH. Chiral pyranopyrazoles and pyranocoumarins were obtained in excellent enantioselectivities (up to 93%) with moderate yields and moderate enantioselectivities with high yields (up to 84%).
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