phenanthroindolizidine
National Institutes of Health
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Twelve benzylisoquinoline alkaloids, including pavine and phenanthroindolizidine types, were isolated from a MeOH/CH2Cl2 extract…
A concise and efficient enantioselective strategy to synthesize two typical phenanthroindolizidine alkaloids, 14-hydroxyantofine…
A b s t r A c t Tylophora asthmatica (s ynonym- Tylophora indica; family Asclepiadaceae) is a popular traditional remedy for…
In the course of synthesizing 3-demethyltylophorine (1) by Lewis acid catalyzed intramolecular Friedel-Crafts reaction starting…
A new structural phenanthroindolizidine, 2,3,6,7-tetramethoxyphenanthro[9,10,3',4']indolizidine, has been synthesized efficiently…
The total synthesis of alkaloids phenanthroindolizidine 1a, tylophorine 1b, and phenanthroquinolizidine 1c, has been achieved in…
Electrospray ionization multi-stage tandem mass spectrometry (ESI-MS(n)) and liquid chromatography coupled with sequential mass…
We previously reported the presence of cytotoxic substances in extracts of the Danaid butterfly, Ideopsis similis. In the present…
(±)-Phenanthro[9,10-f]indolizidine (I), the basic skeleton of the Tylophora alkaloids, was synthesized by a modification of the…