96861-91-5Relevant academic research and scientific papers
Palladium-Catalyzed Synthesis of Pyrayaquinones, Murrayaquinones, and Murrayafoline-B
Kutz, Sebastian K.,Schmidt, Arndt W.,Kn?lker, Hans-Joachim
, p. 275 - 292 (2016/12/24)
We describe the total synthesis of murrayafoline-B and seven carbazole-1,4-quinone alkaloids. A palladium(II)-catalyzed oxidative cyclization is used to construct the carbazole skeleton. Pyran annulation and oxidation provide pyrayaquinone-A, -B, and -C. DIBAL-H-promoted reductive ring opening of pyrano[3,2-a]carbazole precursors leads to the prenylated and geranylated carbazole-1,4-quinone alkaloids murrayaquinone-B, -C, -D, and -E and to murrayafoline-B.
Synthesis of carbazoloquinone natural products 'on-water'
Norcott,McErlean
, p. 6866 - 6878 (2015/06/25)
The total synthesis of a number of carbazolo-1,4-quinone natural products using on-water chemistry is described. A recently developed domino 'in-water, on-water' process is employed to rapidly and efficiently generate k?niginequinone A, which subsequently enables access to murrayaquinones B, C, D and E, and pyrayaquinones B and C, via a remarkably facile on-water catalysed Claisen rearrangement.
NEW CARBAZOLEQUINONES HAVING DIMETHYLPYRAN RING SYSTEM, FROM MURRAYA EUCHRESTIFOLIA
Furukawa, Hiroshi,Yogo, Motoi,Ito, Chihiro,Wu, Tian-Shung,Kuoh, Chang-Shung
, p. 1320 - 1322 (2007/10/02)
The structures of pyrayaquinone-A (1) and -B (2), the first naturally occurring carbazolequinone alkaloids having a dimethylpyran ring system from Murraya euchrestifolia Hayata (Rutaceae), have been determined by spectral and synthetic experiments.KEYWORDS -pyrayaquinone-A; pyrayaquinone-B; Murraya euchrestifolia; Rutaceae; carbazole alkaloid; carbazolequinone; palladium(II) acetate; dimethylchromene
