Paternò–Büchi reaction
The Paternò–Büchi reaction, named after Emanuele Paternò and George Büchi who established its basic utility and form, is a photochemical reaction that forms four-membered oxetane rings from an excited carbonyl and reacting with an alkene.
yielding an oxetane.
With substrates benzaldehyde and 2-methyl-2-butene the reaction product is a mixture of structural isomers:
Another substrate set is benzaldehyde and furan
The alternative strategy for the above reaction is called the Transposed Paternò−Büchi reaction.
The aza-equivalent of the above reactoin is the Aza Paternò−Büchi reaction.
