Doru Roiban, Elena Serrano, Tatiana Soler, Ion Grosu, Carlos Cativiela and Esteban P. Urriolabeitia
Chem. Commun., 2009, 4681-4683
DOI:
10.1039/B907647F,
Communication
A [2 + 2] photocycloaddition has been observed in regioselectively orthopalladated 2-aryl-4-arylidene-5(4H)-oxazolones, leading to unprecedented cyclobutane-bis(oxazolones).