856-94-0

Basic information

• Product Name: 2H-Naphtho[1,2-b]pyran, 2,2-diphenyl-
• CAS NO: 856-94-0
• Molecular Formula: C25H18O
• Molecular Weight: 334.417
• Mol File: 856-94-0.mol
• Article Data: 9

Chemical Properties

• CAS DataBase Reference: 2H-Naphtho[1,2-b]pyran, 2,2-diphenyl-(CAS DataBase Reference)
• NIST Chemistry Reference: 2H-Naphtho[1,2-b]pyran, 2,2-diphenyl-(856-94-0)
• EPA Substance Registry System: 2H-Naphtho[1,2-b]pyran, 2,2-diphenyl-(856-94-0)

Safety Data

• Hazardous Substances Data: 856-94-0(Hazardous Substances Data)

Upstream product

• 209051-94-5 1-(3,3-diphenylprop-2-enylidene)naphthalen-2-one 
• 73502-43-9 1,1-diphenyl-3-(trimethylsilyl)prop-2-yn-1-ol 
• 1210-39-5 3,3-diphenyl-2-propenal 
• 90-15-3 α-naphthol 
• 3923-52-2 1,1-diphenyl-2-propyn-1-ol 

Relevant articles and documents

Dynamic solvent effects on the thermal cyclization of a hexadienone formed from a diphenylnaphthopyran: An example of a system with distinctly separate medium and chemical contributions to the overall reaction coordinate

Pressure effects on the rate of thermal fading of a colored hexadienone formed from 3,3-diphenyl-3 H-naphtho[2,1-b]pyran were measured at various temperatures in three highly viscous solvents, e.g., 2,4-dicyclohexyl-2-methylpentane, glycerol triacetate, and 2-methylpentane-2,4-diol, as well as in their chemically similar nonviscous counterparts, e.g., methyl acetate, ethanol, and methylcyclohexane. It was demonstrated that the medium and the chemical coordinate had to be treated separately. The experimental data and quantum-mechanical computations agreed with the formation of a cyclic activated complex. The dynamic solvent effects in the systems had to be described by a two-dimensional model that includes separately defined chemical and medium coordinates.

Facile synthesis of 2h-benzo[h]chromenes via an arylamine-catalyzed mannich cyclization cascade reaction

A simple arylamine-catalyzed Mannich-cyclization cascade reaction was developed for facile synthesis of substituted 2H-benzo[h]chromenes. The notable feature of the process included the efficient generation of ortho-quinone methides (o-QMs) catalyzed by a

Convenient synthesis of naphthopyrans using montmorillonite K-10 as heterogeneous catalyst

A simple and mild procedure for the synthesis of different naphthopyrans providing high yields in a short reaction time was reported. The reaction of propargylic alcohols with α- or β-naphthol and dihydroxy naphthalenes in the presence of montmorillonite K-10 was studied. This reaction afforded high yields of the corresponding naphthopyrans. In addition, a number of new phenylene and biphenylen-linked bisnaphthopyrans were synthesized providing excellent yields via the one-pot reaction of bis-propargyl alcohols with β-naphthol.