Sustainable Thioetherification via Electron Donor-Acceptor Photoactivation Using Thianthrenium Salts.

Sustainable Thioetherification via Electron Donor-Acceptor Photoactivation Using Thianthrenium Salts.
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DOI:
10.1002/anie.202202706
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发表时间:
2022-05-23
影响因子:
16.6
通讯作者:
Molander, Gary A.
Molander, Gary A.
中科院分区:
化学1区
文献类型:
--
作者:
Cabrera-Afonso, Maria Jesus;Granados, Albert;Molander, Gary A.

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The synthesis of sulfides has been widely studied because this functional subunit is prevalent in biomolecules and pharmaceuticals, as well as being a useful synthetic platform for further elaboration. Thus, various methods to build C–S bonds have been developed, but typically they require the use of precious metals or harsh conditions. Electron donor-acceptor (EDa) complex photoactivation strategies have emerged as versatile and sustainable ways to achieve C–S bond formation, avoiding challenges associated with previous methods. This work describes an open-to-air, photoinduced, site-selective C–H thioetherification from readily available reagents via EDA complex formation, tolerates a wide range of different functional groups. Moreover, C(sp2)–halogen bonds remain intact using this protocol, allowing late-stage installation of the sulfide motif in various bioactive scaffolds, while allowing yet further modification through more traditional C-X bond cleavage protocols. Additionally, various mechanistic investigations support the envisioned EDA complex scenario. A versatile electron donor-acceptor (EDa) complex thioetherification was developed using simple organic compounds (thianthrenium salts and thiols) and visible-light irradiation under open-to-air conditions. This protocol allows the retention of the C-X bond, as well as the late-stage thioetherification of biomolecules.
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