Publication: From blue Azulenes to blue Heptalenes - new strongly polarized π-convertible heptalenes
From blue Azulenes to blue Heptalenes - new strongly polarized π-convertible heptalenes
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Landmesser, T., Linden, A., & Hansen, H.-J. (2013). From blue Azulenes to blue Heptalenes - new strongly polarized π-convertible heptalenes. Helvetica Chimica Acta, 96(10), 1851–1893. https://doi.org/10.1002/hlca.201300138
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The 1,5,6,8,10-pentamethylheptalene-4-carboxaldehyde (4b) (together with its double-bond-shifted (DBS) isomer 4a) and methyl 4-formyl-1,6,8,10-tetramethylheptalene-5-carboxylate (15b) were synthesized (Schemes 3 and 7, resp.). Aminoethenylation of 4a/4b with N,N-dimethylformamide dimethyl acetal (=1,1-dimethoxy-N,N-dimethylmethanamine=DMFDMA) led in DMF to 1-[(1E)-2-(dimethylamino)ethenyl]-5,6,8,10-tetramethylheptalene-2-carboxaldehyde (18a; Scheme 9), whereas the stronger aminoethenylation agent N,N,N′,N′,N″,N″-hexamethylmethanetriam
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- Landmesser, Thomas
- Hansen, Hans-Jürgen
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Landmesser, T., Linden, A., & Hansen, H.-J. (2013). From blue Azulenes to blue Heptalenes - new strongly polarized π-convertible heptalenes. Helvetica Chimica Acta, 96(10), 1851–1893. https://doi.org/10.1002/hlca.201300138