Tetrahedron p. 5341 - 5346 (1985)
Update date:2022-08-04
Topics:
Khan, M. Niaz
Fleury, Jean-Pierre
Baumlin, Philippe
Hubschwerlen, Christian
Amides or vinylogous amides react with tosyl chloride-pyridine to form activated intermediates which condense with Fischer's base or their vinylogs to give carbocyanine structures.Under the same conditions formylated Fischer's base reacts with vinylogous Fischer's bases to give trinuclear carbocyanines in good yields.Their structure and the limitations of this route are discussed.
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