Journal
ORGANIC LETTERS
Volume 23, Issue 23, Pages 9309-9314Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.orglett.1c03687
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Funding
- National Natural Science Foundation of China [21801036, 22071014, 22003001]
- Liaoning Revitalization Talents Program [XLYC1907036]
- Fundamental Research Funds for the Central Universities [DUT19LK54, DUT19TD28]
- Anhui Provincial Natural Science Foundation [2108085Y04]
- Innova-tion and Entrepreneurship Project of Overseas Returnees in Anhui Province [2020LCX006]
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A new and facile method for the synthesis of 1-substituted cyclopropylamines via phosphine-catalyzed reaction was described. It shows good selectivity and efficiency, and practicality for late-stage modification, scaled-up reactions, and formal synthesis. Mechanistic aspects were elucidated through experimental and computational studies.
A novel and facile approach to synthesis of 1-substituted cyclopropylamines via phosphine-catalyzed formal tertiary C-sp3-H amination of cyclopropanes was described. The indoles, pyrroles, imidazoles, uracils, 2-pyridone, pyrimidin-4(3H)-one, and phthalimide had been proven as good aminating partners. The present protocol features transition-metal-free, excellent regioselectivity, high-atom-economy, and mild reaction conditions and a broad range of substrates. The practicability of this protocol can also be demonstrated with late-stage modification of bioactive molecules, scaled up reaction, and divergent derivatization. Notably, the method has been used in the formal synthesis of the hormone-sensitive lipase (HSL) inhibitor. The mechanistic aspects were elucidated by both experimental and computational studies.
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