840-17-5

Upstream product

• 100-52-7 benzaldehyde 
• 40450-19-9 1-Azulenylmethyl-triphenylphosphonium 
• 7206-61-3 1-formylazulene 
• 1100-88-5 benzyltriphenylphosphonium chloride 
• 1449-46-3 benzyltriphenylphosphonium bromide 
• 840-16-4 cis-1-styrylazulene 
• 103-82-2 phenylacetic acid 
• 854154-85-1 N-(1-azulenemethylene)phenylamine 
• 854154-96-4 [1-Azulen-1-yl-meth-(E)-ylidene]-p-tolyl-amine 
• 854154-95-3 4'-methoxy-N-(azulen-1-ylmethylene)aniline 
• 40450-20-2 (azulene-1-ylmethyl)trimethylammonium iodide 

Downstream Products

• 40450-40-6 trans-3-Chlor-1-styrylazulen 

Relevant academic research and scientific papers

Pathways for the solvent-free condensation between schiff bases and methylenic compounds

Pathways for the solvent-free condensation between Schiff Bases and methylenic compounds are discussed taking into account the reported mechanistic purposes and new experimental data.

2-Substituted (Azulen-1-yl)ethenes

An easy and efficient solvent-free synthesis of 1-(azulen-1-yl)-2-aryl- and heteroarylethenes is described. The reaction was performed simply by melting solid mixtures of azulenic Schiff bases and arylacetic acids, the crude products being purified by column chromatography. Limitations of the method were established by study of a large range of aryl and heteroarylacetic acids and also by examination of various azulenic Schiff bases. The same reaction was observed with other active methylene compounds, such as malonic acid and its derivatives or 1,3-diketones. Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2003.

Photochemical Cis to Trans One-Way Isomerization of Styrylazulenes on Their Triplet Excited State. Examination of Ethylenes with Non-Benzenoid Substituents of Low Triplet Energies

1-Styrylazulene and 7-isopropyl-1,4-dimethyl-3-styrylazulene (3-styrylguaiazulene) underwent one-way isomerization from the cis to the trans isomer on triplet sensitization.Their triplet states as intermediates of the isomerization were observed by laser flash photolysis.However, their excitation to either the lowest excited single state (S1) or the second excited singlet state (S2) by direct irradiation afforded photostationary mixtures comprising 98percent of the trans and 2percent the cis isomers, which implies the participation of a singlet isomerization path.