期刊
GREEN CHEMISTRY
卷 18, 期 24, 页码 6445-6449出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c6gc02776h
关键词
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资金
- National Key Research and Development Program of China [2016YFA0602900]
- National Natural Science Foundation of China [21490572, 21420102003]
- Pearl River S&T Nova Program of Guangzhou [201610010160]
Under transition-metal-free conditions, calcium carbide was used as the acetylide source to react with a wide range of N-tosylhydrazones derived from aldehydes or ketones, affording various substituted pyrazoles in good yields with high regio-selectivities. The transformations go through [3 + 2] cycloadditions followed by [1,5]-sigmatropic rearrangements, which are supported by deuterium-labeling experiments.
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