Functionalized 1,3-diaminotruxillic acids by Pd-mediated C-H activation and [2+2]-photocycloaddition of 5(4H)-oxazolones

C. C. and E. P. U. thank the Gobierno de Aragon–Fondo Social Europeo (Spain, reference group Aminoacidos y Peptidos E19_17R) for financial support and the Servicio General de Apoyo a la Investigacion–SAI, Universidad de Zaragoza. E. P. U. thanks the COST program under the CA15106 (CHAOS, C–H Activation in Organic Synthesis) grant.