211796-93-9

Upstream product

• 4160-63-8 2-(4-methoxybenzoyl)thiophene 
• 135-19-3 β-naphthol 
• 211796-85-9 1-(thiophen-2-yl)-1-(4-methoxyphenyl)-prop-2-yn-1-ol 

Downstream Products

• 1032582-06-1 3-{5-((4-dimethylaminophenyl)(phenyl)hydroxymethyl)thien-2-yl}-3-(4-methoxyphenyl)-3H-naphtho[2,1-b]pyran 
• 1032582-08-3 3-{5-((4-diethylaminophenyl)(phenyl)hydroxymethyl)thien-2-yl}-3-(4-methoxyphenyl)-3H-naphtho[2,1-b]pyran 

Relevant academic research and scientific papers

Two stage colour modulation of triarylmethine dyes derived from a photochromic naphthopyran

The synthesis of the unsymmetrical triarylmethine dyes 4 derived from a lithiated naphthopyran and diaryl ketones is reported. In toluene solution 4 display a typical reversible photochromic response becoming coloured upon irradiation with UV light and fa

Oligothiophene-linked bisnaphthopyrans: Sequential and temperature- dependent photochromism

Photochromic bisnaphthopyrans linked with oligothiophenes were synthesized and their photochromic behavior studied. Sequential and temperature-dependent photochromism was observed in the oligothiophene linked bisnaphthopyrans. The kinetics of photo and thermal processes in bisnaphthopyrans in comparison with naphthopyrans were studied, Substituent and linking effects on the photochromic properties are discussed. We demonstrate that the cross-talk between the two photochromophores is dependent on the length of the oligothiophene linker. The presence of the bithiophene linker led to high colorability and high quantum yield of coloration.

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.

Synthesis of Thiophene-Substituted 3H-Naphtho[2,1-b]pyrans, Precursors of Photomodulated Materials

The synthesis of 3H-naphtho[2,1-b]pyrans 9-21 linked to a thiophene moiety is described. Two different synthetic approaches were applied to prepare these novel functionalized compounds, and their spectrokinetic properties in solution are reported.