Schenck reaction 

https://doi.org/10.1351/goldbook.ST07476
The diastereoselective ene reaction of singlet molecular dioxygen with alkenes. An example is:
Source:
PAC, 2007, 79, 293. (Glossary of terms used in photochemistry, 3rd edition (IUPAC Recommendations 2006)) on page 418 [Terms] [Paper]