1932
DOI: 10.1073/pnas.18.3.215
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Azo Derivatives of the Pyrimidines

Abstract: Introduction.-This paper contains a preliminary survey of the azo derivatives of the pyrimidines with particular reference to derivatives of uracil. These derivatives fall into five natural types according to the nature of the components entering into their formation as follows: Those formed by (1) The coupling of aromatic diazonium salts with pyrimidine phenols. (2) The coupling of diazopyrimidines with aromatic phenols. (3) The coupling of diazopyrimidines with pyrimidine phenols.

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Cited by 15 publications
(2 citation statements)
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“…[20][21] The conversion of Z-isomer to E-isomer for DZ is attained via 370-400 nm light (blue) irradiation with over 90 % efficiency while the half lifetime of thermal relaxation is usually a few hours. We note that there are several other azoheteroarene photoswitches available, [5,[9][10][11][12][13][14][15] including arylazoimidazoles, [22] arylazoindazoles, [23] arylazaindoles, [24] arylazothiophenes, [25] arylazotriazoles, [26] azopyrimidines, [27] azobenzothiazoles, [28] azopyroles [29] etc., which are yet to be explored extensively in the context of material or biology related applications and will not be considered here.…”
Section: Photophysical Characteristicsmentioning
confidence: 99%
“…[20][21] The conversion of Z-isomer to E-isomer for DZ is attained via 370-400 nm light (blue) irradiation with over 90 % efficiency while the half lifetime of thermal relaxation is usually a few hours. We note that there are several other azoheteroarene photoswitches available, [5,[9][10][11][12][13][14][15] including arylazoimidazoles, [22] arylazoindazoles, [23] arylazaindoles, [24] arylazothiophenes, [25] arylazotriazoles, [26] azopyrimidines, [27] azobenzothiazoles, [28] azopyroles [29] etc., which are yet to be explored extensively in the context of material or biology related applications and will not be considered here.…”
Section: Photophysical Characteristicsmentioning
confidence: 99%
“…Wir weisen darauf hin, dass es weitere Azoheteroaren Photoschalter gibt, wie z. B. Arylazoimidazole, [22] Arylazoindazole, [23] Arylazaindole, [24] Arylazothiophene, [25] Arylazotriazole, [26] Azopyrimidine, [27] Azobenzothiazole [28] und Azopyrole [29] usw., die im Zusammenhang mit materiellen oder biologischen Anwendungen noch nicht eingehend erforscht wurden und hier daher nicht weiter berücksichtigt werden sollen. Die Halbwertszeit und die anderen photophysikalischen Eigenschaften der Photoschalter können ebenfalls durch äußere Faktoren wie Lösemittelpolarität, pH‐Wert, Koordinierung (Wasserstoffbrücken, Halogenwechselwirkungen, Metallionen), Temperatur und sogar elektrische Felder beeinflusst werden.…”
Section: Photophysikalische Eigenschaftenunclassified