A beneficial, scalable and efficient methodology for the synthesis of aniline-based triarylmethanes has been established through the double Friedel-Crafts reaction of commercial aldehydes and primary, secondary or tertiary anilines using Brönstedacidicionicliquid as a powerful catalyst, namely [bsmim][NTf2]. This protocol was successfully performed under metal- and solvent-free conditions with a
Synthesis and Characterization of <i>N</i>-Demethylated Metabolites of Malachite Green and Leucomalachite Green
作者:Bongsup P. Cho、Tianle Yang、Lonnie R. Blankenship、Joanna D. Moody、Mona Churchwell、Frederick A. Beland、Sandra J. Culp
DOI:10.1021/tx0256679
日期:2003.3.1
protozoan infections in fish, undergoes sequential oxidation to produce various N-demethylated derivatives (monodes-, dides(sym)-, dides(unsym)-, trides-, and tetrades-) both before and after reduction to leucomalachite green (LMG). The close structure resemblance of the metabolites with aromatic aminecarcinogens implicates a potential genotoxicity from exposure to MG. The availability of the synthetic
Synthesis of Symmetric Bis(<i>N</i>-alkylaniline)triarylmethanes via Friedel–Crafts-Catalyzed Reaction between Secondary Anilines and Aldehydes
作者:Rafael F. A. Gomes、Jaime A. S. Coelho、Raquel F. M. Frade、Alexandre F. Trindade、Carlos A. M. Afonso
DOI:10.1021/acs.joc.5b01875
日期:2015.10.16
The first general protocol for the preparation of symmetric triarylmethanes bearing secondary anilines by ytterbium-catalyzed Friedel–Crafts reaction of hetero(aryl) aldehydes and secondary anilines is reported. Mechanistic studies indicated that the iminium ion intermediate is the electrophilic partner. The reaction is greatly accelerated by high pressure (9 kbar) and showed a broad substrate scope
B(OH)<sub>3</sub>‐Catalyzed Dual Friedel‐Crafts Type Reaction of Anilines and Aldehydes to Access Di‐ or Triarylmethanes (TRAMs)
作者:Yaqoob A. Teli、Reetu Reetu、Raghuram Gujjarappa、Sourav Banerjee、Susanta Ghanta、Mayur Jagdishbhai Patel、Virender Singh、Nabil Al‐Zaqri、Ragini Sengupta、Chandi C. Malakar
DOI:10.1002/ejoc.202301086
日期:2024.2.19
The B(OH)3-catalyzed dual Friedel-Craftstypereaction has been developed to install a tertiary Csp3-center. The efficacy of this process is explored towards the preparation of symmetric and unsymmetric tri-arylmethanes (TRAMs).
An electrochromic resin composition comprising (A) 100 parts by weight of a network comprising a crosslinked polymer containing 4,4′-diaminodiphenylmethane units in a form in which the amino groups in the formula are quaternized, and (B) 5 to 150 parts by weight of an electrolytic material uniformly dispersed in the network (A). The crosslinked polymer containing the units with the amino groups therein being the quaternized state is useful as an electrochromic or photochromic material.