The potentials of semiconductor photocatalysis in organic synthesis cannot be overemphasised. By far, many organic substances have been successfully synthesised at laboratory scale. Some revolutionary features of these photocatalytic routes include greenness and the ability to proceed in one pot. Herein, an overview of the routes and suggested mechanisms to important functional groups is given, and where necessary, contrast with the conventional routes is made.The potentials of semiconductor photocatalysis in organic synthesis cannot be overemphasised. By far, many organic substances have been successfully synthesised at laboratory scale. Some revolutionary features of these photocatalytic routes include greenness and the ability to proceed in one pot. Herein, an overview of the routes and suggested mechanisms to important functional groups is given, and where necessary, contrast with the conventional routes is made.