94127-11-4Relevant articles and documents
Carbazole N-substituent effect upon DTMA: Stabilizing and photochromic modulating
Huo, Zhiming,Li, Zhipeng,Wang, Tingting,Zeng, Heping
supporting information, p. 8964 - 8973 (2013/09/23)
Dithienylmaleimide derivatives 7-27 were synthesized by introducing N-substituted carbazole for photo-stabilizing purpose, and the structures were fully confirmed. The photochromism and photo-stability were recorded via UV-vis spectra. Only ortho compounds 8-17 with N-substituents on carbazole moiety showed escalated photochromic change, while compound 7 and the para counterparts 18-27 showed no appreciable photochromism. Additionally, compounds 8-18 exhibited good photo-stability except 17 under 254 nm irradiation. The unstability of 17 may probably due to overrunning hindrance. These photochromic patterns indicated that hindrance and electronic effect mutually paid a decisive influence on the photochromism and photo-stability, which potentially exploited a new way to construct novel photochromic materials with regulable and conceivable performance.
N-METHYL DERIVATIVES OF 3-AMINOCARBAZOLE
Kyziol, Janusz B.,Daszkiewicz, Zdzislaw
, p. 839 - 847 (2007/10/02)
Methylation of 3-aminocarbazole in presence of sodium hydrogencarbonate yields carbazolyl-3-trimethylammonium iodide, in alkaline media the fourth methyl group is introduced. 3-(N,N-Dimethylamino)-carbazoles were obtained from corresponding methiodides by lithium aluminium hydride reduction or by thermal decomposition.Synthesis of 3-(N-methylamino)-carbazole via tosylamide failed because of 3-(N-methyltosylamino)-9-tosylcarbazole cleaved only one sulfonamide bond.The method involving formylation of 3-aminocarbazole and reduction of the amide gave satisfactory results.