Zhao W Carreira EM 2006 [reaction: see text] Phenylene-linked bisnaphthopyrans were synthesized in good yields via the one-pot reaction of bis-propargyl alcohols with naphthols. Temperature-dependent photochromism in 1,4-phenylene-linked bispyrans leads to up to 60 nm bathochromic shift between the colored species formed at room temperature and at -20 degrees C. Better fatigue resistance and higher colorability was observed in 1,4-phenylene-linked bis-[2H]-naphtho[1,2-b]pyrans by comparison to the 1,3-phenylene linked bis-[2H]-naphtho[1,2-b]pyrans. https://sonar.ch/global/documents/152037 eng info:eu-repo/semantics/altIdentifier/doi/10.1021/ol052587y info:eu-repo/semantics/altIdentifier/pmid/16381577 Organic letters. - 2006 Synthesis and photochromism of novel phenylene-linked photochromic bispyrans. http://purl.org/coar/resource_type/c_6501