期刊
ORGANIC LETTERS
卷 21, 期 18, 页码 7519-7523出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.orglett.9b02800
关键词
-
资金
- Natural Science Foundation of China [21572264, 21871293]
- Chinese Universities Scientific Fund [2018TC052, 2018TC055, 2019TC085]
Although carbon-carbon, carbon-nitrogen, and carbon-oxygen double bonds or their combinations have extensively been applied in phosphine-catalyzed asymmetric cycloaddition, a nitrogen-nitrogen double bond has never been investigated in chiral phosphine catalysis. In this paper, we present phosphine-catalyzed asymmetric [3+2] cycloaddition of diazenes with Morita-Baylis-Hillman (MBH) carbonates to give chiral dihydropyrazoles in high yields with excellent enantioselectivities. Various MBH carbonates and diazenes worked well under the mild reaction conditions.
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