200884-10-2

Upstream product

• 78250-21-2 5-hydroxy-7-oxo-7H-benzo(c)-fluorene 
• 3923-52-2 1,1-diphenyl-2-propyn-1-ol 
• 1560648-02-3 4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)naphthalen-1-ol 
• 571-57-3 4-bromo-1-naphthol 

Downstream Products

• 200884-11-3 3,3-diphenyl-13-hydroxy-13-(2-oxo-2-ethoxyethyl)-1H-indeno[2,1-f]naphtho[1,2-b]pyran 

Relevant academic research and scientific papers

Polysubstituted indene fused-ring naphthopyran photochromic compound and preparation method thereof

The invention relates to the field of organic functional materials and provides a polysubstituted indene fused-ring naphthopyran photochromic compound as well as a preparation method and the application thereof. In a synthesis method, no isomer phenomenon

Substituent effects on the photochromic properties of 3,3-diphenyspiro[benzofluorenopyran-cyclopentaphenanthrene]s

The introduction of electron-donating groups on the skeleton of a naphthopyran, 3,3-diphenyspiro[benzofluorenopyran-cyclopentaphenanthrene], has led to the development of a photochromic dye applicable to photochromic lenses. Introducing a methoxy group to C6 moved the absorption band of the MC form towards the longer wavelength. Further introduction of methoxy groups to the para-position of the phenyl groups on C3 induced faster decoloration of the MC form. Additional introduction of a methoxy group to C13 led to the enhancement of the absorption intensity as well as the facile, economic synthesis of the dye caused by the symmetrical property of the starting material.

Facile One-Pot Synthesis of Photochromic Pyrans

(Equation presented) Photochromic pyrans, including [3H]naphtho[2,1-b] pyrans, [2H]naphtho[1,2-b]pyrans, indeno-fused naphtho[1,2-b]pyrans, and heteroannulated pyrans, were synthesized in excellent yields through a facile one-pot procedure by reaction of propargyl alcohol and naphthol or phenol derivatives in the presence of 5 mol% PPTS and 2 equiv of (MeO)3CH. Symmetrical and nonsymmetrical bispyrans can also be prepared using the protocol.

NOVEL PHOTOCHROMIC INDENO-FUSED NAPHTHOPYRANS

Described are novel photochromic indeno-fused naphthopyran compounds, examples of which are naphthopyran compounds having a substituted or unsubstituted indeno group, the 2,1 positions of which are fused to the f side of the naphtho portion of the naphtho