Journal
ACCOUNTS OF CHEMICAL RESEARCH
Volume 38, Issue 9, Pages 713-721Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ar0402356
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Photo (sensitized) cleavage of benzenediazonium salts as well as, when an electron-donating substituent is present, of aryl chlorides, fluorides, mesylates, triflates, and phosphates leads to the corresponding phenyl cations in the triplet state. These otherwise unavailable intermediates add selectively to alkenes, alkynes, and (hetero)arenes, giving arylation products in a good yield. The reactions are photochemical alternatives of metal-catalyzed Heck and cross-coupling reactions and bear some mechanistic analogy with them.
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