title: Synthesis of novel photochromic pyrans via palladium-mediated reactions.
abstract: Photochromic pyrans for applications in material and life sciences were synthesized via palladium-mediated cyanation, carbonylation and Sonogashira cross-coupling starting from bromo-substituted naphthopyran 1 and benzopyrans 2a/b. A novel photoswitchable benzopyran-based omega-amino acid 6 for Fmoc-based solid-phase peptide synthesis is presented. The photochromic behaviour of the 3-cyano-substituted benzopyran 5a was investigated by time-resolved absorption spectroscopy in the picosecond time domain.
authors: Institut für Chemie, Technische Universität Berlin, Strasse des 17. Juni 135, 10623 Berlin, Germany.
authors: Christoph
authors: C
authors: Böttcher
authors: Gehad
authors: G
authors: Zeyat
authors: Saleh A
authors: SA
authors: Ahmed
authors: Elisabeth
authors: E
authors: Irran
authors: Thorben
authors: T
authors: Cordes
authors: Cord
authors: C
authors: Elsner
authors: Wolfgang
authors: W
authors: Zinth
authors: Karola
authors: K
authors: Rueck-Braun