6526-38-1Relevant articles and documents
Synthese von Betenamin und von Betalain-Modellsubstanzen
Parikh, Indu,Hilpert, Hans,Hermann, Kurt,Dreiding, Andre S.
, p. 1588 - 1596 (1986)
For comparisons of color, spectroscopic properties, pKa values, and stabilities, a number of model substances containing the 1,7-diazaheptamethinium chromophore 8 of the yellow and red betalaine plant pigments were prepared by the thermal or ph
Synthesis and properties of merocyanine dyes derived from N-aryl-substituted pyridinium salts and cyanoacetic acids
Borisova,Zubarev,Rodinovskaya,Shestopalov
, p. 1868 - 1872 (2018)
A series of merocyanine dyes were synthesized by two-component condensation of N-aryl-4-picolinium salts and cyanoacetic acid derivatives. Physicochemical properties of the synthesized dyes were studied.
Synthesis of δ-tributylstannyl-α,βγ, δ-unsaturated aldehydes from pyridines
Michels, Theo D.,Rhee, Jong Uk,Vanderwal, Christopher D.
supporting information; experimental part, p. 4787 - 4790 (2009/05/07)
(Equation Presented) Zincke aldehydes, which are readily available from the ring-opening reaction of pyridinium salts, are easily converted into δ-tributylstannyl-α,β,γ,δ-unsaturated aldehydes (stannyldienals) by the action of tributylstannyllithium. This reaction appears to proceed via 1,6-stannyllithium addition/elimination of lithium dialkylamide. Several stannyldienals of significant utility for the synthesis of polyene natural products have been made by this route, which proceeds in modest yields, but is successful on multigram scale using inexpensive reagents. Simple stannylenals and stannylenones are similarly available from the corresponding vinylogous amides.
