91801-97-7Relevant articles and documents
Site-Specific Synthesis of Carbazole Derivatives through Aryl Homocoupling and Amination
Baek, Junghyun,Ban, Jaeyoung,Lim, Minkyung,Rhee, Hakjune,Shabbir, Saira
, p. 917 - 927 (2020/03/13)
We synthesized various carbazoles from anilines through a three-step process with good overall yields (up to 48percent). This process comprises N -acetylation, copper(0)-mediated Ullmann homocoupling, and acid-mediated intramolecular amination. It permits various functional groups on the substrate. Scale-up of the developed three-step synthetic route to carbazoles was also demonstrated.
Synthesis of butadiyne-bridged [4n] metacyclophanes having exo-annular t-butyl groups
Tobe, Yoshito,Utsumi, Naoto,Nagano, Atsushi,Sonoda, Motohiro,Naemura, Koichiro
, p. 8075 - 8083 (2007/10/03)
Butadiyne-bridged [44]- and [48]metacyclophanes having exo-annular t-butyl groups were prepared by intermolecular Eglinton coupling of the dimeric unit or by intramolecular ring closure of the linear tetramer. Comparison of the 1H and 13C NMR spectra of [44]metacyclophane with those of [48]cyclophane and diphenylbutadiyne revealed its prominent geometrical feature due to deformation of the triple bonds from linearity. The [44]Metacyclophane was converted into [08]thiophenometacyclophane in good yield by treatment with sodium sulfide.
Synthesis and self-association properties of diethynylbenzene macrocycles
Tobe, Yoshito,Utsumi, Naoto,Kawabata, Kazuya,Naemura, Koichiro
, p. 9325 - 9328 (2007/10/03)
We synthesized diethynylbenzene macrocycles (DBMs), cyclic oligomers of diethynylbenzene, having functional groups in the periphery of the macrocyclic framework and investigated their self-association properties in solution resulting from π-π stacking interaction. The tetrakis-DBM having hexadecyl ester groups showed dimerization behavior not only in chloroform-d, but also in o-dichlorobenzene-4.