Naturally occurring cyclotryptophans and cyclotryptamines

U Anthoni, C Christophersen… - Alkaloids: chemical and …, 1999 - books.google.com
The term cyclotryptophans is proposed in this review to describe alkaloids containing the 1,
2, 3, 3a, 8, 8a-hexahydropyrrolo [2, 3-blindole ring system. The cyclotryptophans are …

Biologically Active Aspidofractinine, Rhazinilam, Akuammiline, and Vincorine Alkaloids from Kopsia

G Subramaniam, O Hiraku, M Hayashi… - Journal of natural …, 2007 - ACS Publications
Eleven new indole alkaloids, in addition to the previously reported rhazinal (1), and 14 other
known alkaloids, were obtained from the Malayan Kopsia singapurensis, viz., kopsiloscines …

Alkaloids of Alstonia angustifolia

K Ghedira, M Zeches-Hanrot, B Richard, G Massiot… - Phytochemistry, 1988 - Elsevier
Thirty-one alkaloids have been isolated from the leaves and from the stem bark of Alstonia
angustifolia from Malaysia. Twenty of them were known compounds: yohimbine, O-acetyl …

Direct, enantioselective synthesis of pyrroloindolines and indolines from simple indole derivatives

J Ni, H Wang, SE Reisman - Tetrahedron, 2013 - Elsevier
The (R)-BINOL· SnCl4-catalyzed formal (3+ 2) cycloaddition between 3-substituted indoles
and benzyl 2-trifluoroacetamidoacrylate is a direct, enantioselective method to prepare …

A New Structural Class of Bisindole Alkaloids from the Seeds of Catharanthus roseus: Vingramine and Methylvingramine

A Jossang, P Fodor, B Bodo - The Journal of Organic Chemistry, 1998 - ACS Publications
Two new bisindole alkaloids, vingramine (1) and methylvingramine (2), were isolated from
the seeds of Catharanthus roseus, Apocynaceae. The structures were determined by …

Synthetic studies on vincorine: access to the 3a, 8a-dialkyl-1, 2, 3, 3a, 8, 8a-hexahydropyrrolo [2, 3-b] indole skeleton

Y Yasui, T Kinugawa, Y Takemoto - Chemical communications, 2009 - pubs.rsc.org
Synthetic studies on vincorine are described; the conversion of 3-aminoethyl-3-
alkyloxindoles to 3a, 8a-dialkyl-1, 2, 3, 3a, 8, 8a-hexahydropyrrolo [2, 3-b] indoles has been …

Akuammine and dihydroakuammine, two indolomonoterpene alkaloids displaying affinity for opioid receptors

G Lewin, P Le Ménez, Y Rolland… - Journal of natural …, 1992 - ACS Publications
Akuammine [1], an indolomonoterpene alkaloid, which is the major com-ponent of the seeds
of Picralima nítida, was reduced to dihydroakuammine {4], This compound has structural …

Relative configuration and cytotoxic activity of vincarubine: a novel bisindole alkaloid from Vinca minor

B Proksa, D Uhrin, E Grossmann, Z Votický… - Planta …, 1988 - thieme-connect.com
The relative configurations of the new bisindole alkaloid vincarubine and its two O-
acetyldihydro derivatives were deduced from spectral data. It has been shown that the …

Alcaloëdes du Petchia ceylanica

A Cavé, N Kunesch, J Bruneton… - Journal of Natural …, 1987 - ACS Publications
Petchia ceylanica (Wight) Li vera est un genre monospécifique endémique de Sri Lanka,
appartenant á la famille des Apocynacées, tribu des Rauwolfiées (1, 2). C'est un petit …

Alkaloids from Alstonia Macrophylla

LS Huah - 2013 - search.proquest.com
Abstract The Malaysian plant, Alstonia macrophylla Wall, was investigated for its alkaloidal
content and the results are summarized in the Table below. A total of 90 alkaloids were …