74991-91-6Relevant academic research and scientific papers
Two-step total syntheses of Canthin-6-one alkaloids: New one-pot sequential Pd-catalyzed Suzuki-Miyaura coupling and Cu-catalyzed amidation reaction
Gollner, Andreas,Koutentis, Panayiotis A.
supporting information; experimental part, p. 1352 - 1355 (2010/06/11)
Chemical Equation Presented Canthin-6-one (1) and nine analogues including the naturally occurring 9-methoxycanthin-6-one (2) and amaroridine (3) are prepared rapidly and in high yields via a convergent non-classical strategy that focuses on construction of the central ring B. The strategy relies on concomitant Pd-catalyzed Suzuki-Miyaura C-C coupling followed by a Cu-catalyzed C-N coupling that can be achieved either stepwise or in a new one-pot protocol starting from the appropriate 8-bromo-1,5-naphthyrldine.
New alkaloids, picrasidines W, X and Y, from Picrasma quassioides and X- ray crystallographic analysis of picrasidine Q
Li,Koike,Ohmoto
, p. 1807 - 1811 (2007/10/02)
Three new alkaloids, picrasidines W (1), X (2) and Y (3), were isolated from the wood of Picrasma quassioides BENNET (Simaroubaceae). Their structures were determined by spectral and chemical evidence. Previously isolated picrasidine Q (4) was unambiguously determined by X-ray crystallographic analysis.
