Novel push–pull butadienes derived from 1,1-diaryl-2-propyn-1-ols and 1,1,1,5,5,5-hexafluoro-2,4-pentanedione: Synthesis, absorption spectra and solvatochromic behaviour
摘要:
Butadiene dyes were synthesized by the catalytic C-C coupling of 1,1-diaryl-2-propyn-1-ols with 1,1,1,5,5,5-hexafluoro-2,4-pentanedione. The reaction, which was promoted by the 16e(-) (eta(3)-allyl)-ruthenium(II) complex [Ru(eta(3)-2-C3H4Me)(CO)(dppf)][SbF6], involved the Meyer-Schuster rearrangement of the aromatic alkynol and subsequent aldol-type condensation of the resulting enal with the fluorinated beta-dicarbonyl compound. The absorption spectra of the dyes, as well as their solvatochromic behaviour, were studied: the structure of (4-C6H4OMe)(2)C=CH-CH=C(COCF3)(2) was unambiguously confirmed by means of single-crystal X-ray diffraction. (C) 2010 Elsevier Ltd. All rights reserved.
Novel push–pull butadienes derived from 1,1-diaryl-2-propyn-1-ols and 1,1,1,5,5,5-hexafluoro-2,4-pentanedione: Synthesis, absorption spectra and solvatochromic behaviour
作者:Javier Borge、Victorio Cadierno、Josefina Díez、Sergio E. García-Garrido、José Gimeno
DOI:10.1016/j.dyepig.2010.03.028
日期:2010.11
Butadiene dyes were synthesized by the catalytic C-C coupling of 1,1-diaryl-2-propyn-1-ols with 1,1,1,5,5,5-hexafluoro-2,4-pentanedione. The reaction, which was promoted by the 16e(-) (eta(3)-allyl)-ruthenium(II) complex [Ru(eta(3)-2-C3H4Me)(CO)(dppf)][SbF6], involved the Meyer-Schuster rearrangement of the aromatic alkynol and subsequent aldol-type condensation of the resulting enal with the fluorinated beta-dicarbonyl compound. The absorption spectra of the dyes, as well as their solvatochromic behaviour, were studied: the structure of (4-C6H4OMe)(2)C=CH-CH=C(COCF3)(2) was unambiguously confirmed by means of single-crystal X-ray diffraction. (C) 2010 Elsevier Ltd. All rights reserved.