Background: In this Chapter an overview on visible light photocatalyzed carbonheteroatom
bond formations (C-N, C-O, C-P, C-S/Se/Te etc.) and the synthesis of related compounds
by environment friendly approach has been reported. We have discussed visible light photocatalyzed
C-N bond formation including amination, imination, azidation, and amidation. Construction
of C-O and C-P bond have also been studied by photoredox catalysis under visible light
irradiation implicating a novel, powerful and green strategy. Visible light photocatalysis is also
useful in the formation of C-S/Se/Te bonds avoiding harsh reaction conditions.
Methods: Moreover, using visible light irradiation the synthesis of many important heterocycles
such as N-containing heterocycles (pyridine, quinoline, phenanthridine, dibenzo[a,f]quinolizidine
and pyrroles etc), O-containing heterocycles (benzocoumarin, tetrahydrofuran and tetrahydropyran
), P-containing heterocycles (benzo[b]phosphole oxide), N-O-containing heterocycles (oxazole,
isoxazole benzoxazole etc), N-S-containing heterocycles (thiazole and benzothiazole) and OS-
containing heterocycles (oxathiolane) have been demonstrated.
Conclusion: A series of representative reactions and examples have been provided and in specific
cases reaction mechanisms have been discussed for better understanding of the reaction.