3-Dimethylamino-3-phenyl

Acetamide replaces a halogen atom (in 166, B = Ph) by the ace-tamido group (50-60% yield), while dimethylformamide yields 5-dimethylamino-3-phenyl-1,2,4-thiadiazole quantitatively.188... 

MA -Dimethylamino)phenyl]-2-ethylpropenal (5) was produced by reaction of A, A -dimethyl-aniline (/) with 2-ethyl-3-ethoxyacrolein (2) in the presence of phosphorus oxytrichloride. 

Figure 28.3 (a) Silver(III) ethylenedibiguanide complex ion the counter anion can be HSO4, C104 , NOs" or OH . (b) Gold(III) (dimethylamino)phenyl complex ion the counter anion can be Bp4 or C104 . 

Di-fm-butyl-5-[(4-dimethylamino)phenyl[-2-(4-tolyl)oxepin (le) Typical Procedure 187... 

Analog erhalt man aus 2-(4-Dimethylamino-phenyl)-glyoxal-diathylacetal 2-Hydr-oxy-2-(4-dimethylamino-phenyl)-acetaldehyd-diathylacetal2 (95% d.Th. Kp0>01 106°). In Methanol als Solvens werden u.a. folgende Alkohole erhalten ... 

Brom-phenyl)- -1-hydrazon 700 2-(4-Dimethylamino-phenyl)- -1-diathylacetal 274 Phenyl- 744... 

CN (lip,17 3)-ll-[4-(dimethylamino)phenyl]-17-hydroxy-17-(l-propynyl)estra-4,9-dien-3-one... 

Green S (E 142, Cl Food Green 4, Brilliant Green BS) is a triarylmethane dye, with the chemical name sodinm N-[4-[[4-(dimethylamino)phenyl](2-hydroxy-3,6-disnlfo-l-naphthalenyl)-methylene]-2,5-cyclohexadien-l-ylidene]-N-methylmetha-naminium. The calcium and potassinm salts are also permitted. Green S is a dark bine or green powder or grannies, solnble in water, slightly solnble in ethanol, with a maximum absorption in water at 632 nm = 1720). It is not permitted as a... 

Dimethylaminophenyl)-3,4-dihydroquinoxaline gave 2-(p-dimethylamino-phenyl)quinoxaline (tetrachlorobenzoquinone, PhH, reflux, 1 h 76%).780... 

Crystal Violet, Gentian Violet N-[4-[Bis[4-dimethylamino)-phenyl]methylene]-2,5-cyclohexadien-1 -y lidine] -N-methyl-methan-aminium chloride... 

Janus Green B 3-(Diethylamino)-7-[[4-dimethylamino)phenyl[azo]-5-phenyl-phenazinium chloride... 

Malachit Green N-[4-[[4-(Dimethylamino)phenyl]phenyl-methylene]-2,5-cyclo-hexadien -l-ylident]-N-methyl-methanaminium chloride... 

V. Kamat, S. Das, K. G. Thomas, and M. V. George, Photochemistry of squaraine dyes. 1. Excited singlet, triplet, and redox states of bis[4-(dimethylamino)phenyl]squaraine and bis[4-(dimethyl-amino)-2-hydroxyphenyl]squaraine./. Phys. Chem. 96, 195-199(1992). 

Another example of violation of the "alternating polarities rule" is provided by the reaction of rrawj-(dimethylamino)phenyl(2-phenylvinyl)oxosulfonium tetrafluoroborate with the corresponding enamine of acetophenone (Scheme 2.6), in which the typical ambivalent pattern of a carbon chain bearing a group of type A becomes defined finally as a pattern with two vicinal positive charges ... 

In comparison with hydrocarbons, aromatic amines easily transform into cation radicals. Structures of these cation radicals are well documented on the basis of their ESR spectra and MO calculations (see, e.g., Grampp et al. 2005). The stable cation radical of A/,A,A, A -tetramethyl-p-phenylenediamine (the so-called Wuerster s blue) was one of the first ion radicals that was studied by ESR spectroscopy (Weissmann et al. 1953). The use of this cation radical as a spin-containing unit for high-spin molecules has been reported (Ito et al. 1999). Chemical oxidation of N,N -bis [4-(dimethylamino)-phenyl-A/,A -dimethyl-l,3-phenylenediamine with thianthrenium perchlorate in -butyronitrile in the presence of trifluoroacetic acid at 78°C led to the formation of the dication diradical depicted in Scheme 3.58. 

An useful alternative to the already known retropinacol reactions is presented by Liu and co-workers [7], This works demonstrates that pinacols bearing (dimethylamino)phenyl substiments can be subjected to fast oxidative fragmentation via photoinduced electron transfer with chloroform as the electron acceptor in yields up to 80%. The extremely fast dechlorination of the chloroform radical anion inhibits back-electron transfer and thus leads to effective fragmentation of the pinacol radical cation (Scheme 8). 

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