Journal
ORGANIC LETTERS
Volume 20, Issue 4, Pages 1228-1231Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.orglett.8b00161
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Funding
- Fundamental Research Funds for the Central University [HIT.BRE-TIV.201502]
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A metal-free ring opening/halogenation of cycloalkanols, which combines both PPO/TBAX oxidant system and blue LEDs irradiation, is presented. This method produces diverse gamma, delta, and even more remotely halogenated ketones in moderate to excellent yields under mild conditions. Interestingly, experimental and computational studies demonstrate the novel ring size-dependent concerted/stepwise (four-/five- to eight-membered rings) hydrogen atom transfer-electron transfer induced by Bronsted base-tethered acyloxy radical, which indicates distinct advantages brought by the cyclic structure of diacyl peroxides.
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