Workers at Ciba-Geigy and elsewhere have used the ability of 1 to form [2+ 21 photocycloadducts to prepare herbicides, fungicides, and polymers useful for adhesives, coatings, photoresists, and photoimaging formulation^.^ We now report the preparation and characterization of some novel photocycloadducts with unsaturated acids, esters, and allyl derivatives and our evaluation of some of these adducts as monomers for condensation ...
![6-(chloromethyl)-1,5-dimethyl-3-oxabicyclo[3.2.0]heptane-2,4-dione Structure](https://image.chemsrc.com/caspic/158/114058-05-8.png)