90495-13-9

Upstream product

• 89549-36-0 1,1,2,6,-Tetramethyl-4-methylen-2,5-cyclohexadien 
• 34014-87-4 3,4,4,5-Tetramethyl-2,5-cyclohexadien-1-on 
• 74-88-4 methyl iodide 

Downstream Products

• 90495-14-0 Triphenyl<2-(3,4,4,5-tetramethyl-2,5-cyclohexadien-1-yliden)ethyl>phosphonium-iodid 
• 90580-90-8 3,3',4,4,4',4',5,5'-Octamethyl-1,1'-(2,4-hexadien-6,1-diyliden)bis(2,5-cyclohexadien) 
• 90580-89-5 3,3',4,4,4',4',5,5'-Octamethyl-1,1'-(2-buten-4,1-diylidene)bis(2,5-cyclohexadien) 
• 89549-25-7 3,3',4,4,4',4',5,5'-Octamethyl-1,1'-(2-buten-4,1-diylidene)bis(2,5-cyclohexadien) 
• 344741-57-7 Triphenyl-[2-(3,4,4,5-tetramethyl-cyclohexa-2,5-dienylidene)-ethylidene]-λ⁵-phosphane 

Relevant academic research and scientific papers

Multistep Reversible Redox Systems, XXXIV. - Polyenes as Four-Step Redox Systems: Synthesis and Spectroscopy

The synthesis of the pentaenes 2.0-4.0 and of the polyenes 2.1-2.4 is described.All alkenes carry rigid, cross-conjugated end groups.The Dienone 6, the polyene aldehydes 18 and 19 as well as the phosphorous ylid 22 serve as crucial intermediates. 1H NMR and UV/VIS spectra of all polyenes are discussed.