Frontispiece: Flow Photochemistry as a Tool in Organic Synthesis

In his Review on page 16952, Thomas Rehm delves into the rapidly developing area where continuous-flow technology and photochemistry have joined forces. As result of this fruitful combination, flow photochemistry has become a reliable methodology in the portfolio of modern organic synthesis under mild and defined conditions. The Review gives an overview on selected reaction classes, which represent important photochemical transformations in synthetic organic chemistry, and which benefit from mild and defined process conditions by the transfer from batch to continuous-flow mode.