Visible light induced arylation

Compared to processes with electron-rich heteroarenes, the direct C-H arylation of electron-deficient Af-heteroarenes is often difficult. Recently, an efficient visible-light-induced arylation of electron-deficient Af-heteroarenes with aryl diazonium salts has been developed by Xue (Scheme 13.36) [72]. Using Ru(bpy)3Cl2 6H2O as photocatalyst, the reaction proceeds smoothly... 

Scheme 3.18 Visible-light-induced a-C(sp )-H bond arylation of ethers [65]...

Recently, Lei and coworkers described a visible-light-induced direct C-H arylation of isoquinoline with an aryldiazonium salt (Scheme 13.37) [73]. The arylation reaction was applied to a range of substituted isoquinoline and aryldiazonium salts with good functional group tolerance. The method was further applied to the total synthesis of the isoquinohne alkaloids menisporphine and daurioxoiso-porphine C in four and five steps, respectively, from readily available starting materials. 

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