Abstract
The seven-membered heterocycles are widely present in biologically active compounds which provided a reason for the development of protocols for their synthesis. Photochemical reactions are used for organic synthesis, and this review article highlighted the syntheses of heterocycles. Photochemistry is particularly fascinating and afforded an exotic charm due to its unconventional nature. In this review, I have given a clear idea of applicability of photochemical irradiations for the synthesis of a number of seven and higher membered O-heterocycles.
Graphical Abstract
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