Abstract It has been possible to prepare oxetanes from several carbonyl compounds and derivatives of furan, pyrrole and thiophene. This account summarizes the successful and some of the unsuccessful attempts carried out in this laboratory to extend the Paterno-Büchi reaction to the common five-membered heterocyclic systems; the new compounds obtained in this connection are reported and several interesting facts which may help understand ...
![(1R)-6-naphthalen-1-yl-2,7-dioxabicyclo[3.2.0]hept-3-ene Structure](https://image.chemsrc.com/caspic/321/83773-59-5.png)