4993-84-4Relevant academic research and scientific papers
HETROCYCLIZATION OF N-PHENYLAMINO-2-PYRROLIDONES
Zhestkov, V.P.,Druzhinina, V.V.,Rudnitskikh, A.V.
, p. 279 - 283 (1995)
Hetrocyclization of N-phenylamino-2-pyrrolidones with solutions of phosgene takes place with the formation of dihydropyrroloindoles, which on acid cleavage give 2-oxotryptamines or their derivatives.
Alkaloids from Alangium javanicum and Alangium grisolleoides that mediate Cu2+-dependent DNA strand scission
Pham, Van Cuong,Ma, Ji,Thomas, Shannon J.,Xu, Zhidong,Hecht, Sidney M.
, p. 1147 - 1152 (2008/09/18)
Crude CH2Cl2-MeOH extracts prepared from Alangium javanicum and A. grisolleoides were found to induce DNA strand breakage in the presence of Cu2+ and were subjected to bioassay-guided fractionation to permit identification of the active principle(s). Javaniside (1), a novel alkaloid possessing an unusual monoterpenoid oxindole skeleton, was identified as an active principle contributing to the DNA cleavage activity observed for the crude extract of A. javanicum. Alangiside (2), a tetrahydroisoquinoline monoterpene glucoside widely distributed in the genus Alangium, was also isolated from A. grisolleoides as a new type of Cu2+-dependent DNA cleavage agent. The relative configuration of the asymmetric centers in javaniside was established by analysis of 1H-1H coupling constants and NOESY correlations. Semisynthesis of javaniside from secologanin (3) established the absolute stereochemistry of javaniside.
A Simple Entry into the Series of Tetracyclic Hetero- and Secoyohimbanes, Strychnos and Oxindole Alkaloids
Rosenmund, Peter,Hosseini-Merescht, M.,Bub, Christoph
, p. 151 - 158 (2007/10/02)
The divinylogous urethane 4a reacts in diluted acetic acid to give the indolochinolizine 9 (yield 40percent).The total amount grows up to 65percent, if compound 14, prepared from 4a in nearly quantitative yield, is allowed to react with trifluoroacetic ac
REACTIVITY OF OXYTRIPTAMINE. CONVERSION TO 3-(o-AMINOPHENYL)-2-PYRROLIDONE AND KYNURENAMINE
Nakagawa, Masako,Maruyama, Takako,Hirakoso, Kazuyuki,Hino, Tohru
, p. 4839 - 4842 (2007/10/02)
Oxytriptamine 1 was converted to kynurenamine 5, benzooxazinone 6, and 3-hydroxy derivative 7b in NaOH-MeOH in the presence of oxygen, whereas 1 undergoes N,N'-transacylation to give the isomeric product 4 in argon atmosphere.
