Olefin Dihydroxylation Using Nitroarenes as Photoresponsive Oxidants.
Olefin Dihydroxylation Using Nitroarenes as Photoresponsive Oxidants.
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DOI:
10.1002/anie.202214508
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发表时间:
2023-02-13
影响因子:
16.6
通讯作者:
Leonori, Daniele
中科院分区:
文献类型:
--
作者:
Hampton, Charlotte;Simonetti, Marco;Leonori, Daniele
Vicinal diols are abundant among natural and synthetic molecules, and also represent valuable intermediates throughout organic synthesis. Olefin dihydroxylation is an effective strategy to access these derivatives owing to the broad range and availability of alkene feedstocks. OsO4 is among the most used reagents to achieve this transformation, yet its high toxicity and cost remain concerning. Herein, we present a mechanistically distinct strategy for olefin dihydroxylation using nitroarenes as photoresponsive oxidants. Upon purple LEDs irradiation, these species undergo a [3+2]‐photocycloaddition with a wide range of olefins to give stable 1,3,2‐dioxazolidine intermediates. These species can be accumulated in solution and then reduced in situ to the desired diols, utilising readily accessible and easy to handle solid reagents as H2 surrogates. Photoexcited nitroarenes ca be used, in conjunction with Pd‐mediated hydrogenation, as osmium surrogates for olefin dihydroxylation.
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