853305-74-5

Basic information

• Product Name: 5-methoxycarbonyl-3,3-(4,4'-difluorophenyl)-3H-naphtho[2,1-b]pyrane
• Synonyms: 5-methoxycarbonyl-3,3-(4,4'-difluorophenyl)-3H-naphtho[2,1-b]pyrane
• CAS NO: 853305-74-5
• Molecular Weight: 428.435
• Mol File: 853305-74-5.mol
• Article Data: 1

Chemical Properties

• CAS DataBase Reference: 5-methoxycarbonyl-3,3-(4,4'-difluorophenyl)-3H-naphtho[2,1-b]pyrane(CAS DataBase Reference)
• NIST Chemistry Reference: 5-methoxycarbonyl-3,3-(4,4'-difluorophenyl)-3H-naphtho[2,1-b]pyrane(853305-74-5)
• EPA Substance Registry System: 5-methoxycarbonyl-3,3-(4,4'-difluorophenyl)-3H-naphtho[2,1-b]pyrane(853305-74-5)

Safety Data

• Hazardous Substances Data: 853305-74-5(Hazardous Substances Data)

Upstream product

• 92-70-6 3-Hydroxy-2-naphthoic acid 
• 883-99-8 3-hydroxy-2-naphthoic acid methyl ester 
• 357-77-7 1,1-bis(4-fluorophenyl)prop-2-yn-1-ol 

Relevant articles and documents

Photoswitch based on remarkably simple naphthopyrans

Photochromic switches built around 5-carbonyl-3,3-diphenyl-3H-naphtho[2,1- b]pyran unit have been synthesized. Their open forms are constituted of a 1:1 ratio of TC and TT-isomers according to 19F and 1H NMR investigations. Electrocyclization of TT isomers back to the closed form is efficiently achieved upon visible irradiation whereas it has been found to be a particularly unfavoured thermal process. These simple 2H-chromenes could act as molecular photoswitch at ambient temperature.