Showing papers on "Indole alkaloid published in 1975"
TL;DR: Six oxindole alkaloids, not previously known as natural products, have been isolated from samples of U. attenuata and the variation in the alkaloid content of these three species is discussed.
38 citations
TL;DR: Kinetic analysis revealed the alkaloid to be a reversible, linear, non-competitive inhibitor with respect to its substrates, geraniol and NADPH, and observations suggest feedback control of the pathway by catharanthine.
32 citations
27 citations
TL;DR: In this paper, a novel synthesis of the indole alkaloid ellipticine is described, the last step of which follows a possible biogenetic pathway, followed by a possible bio-pathway.
Abstract: A novel synthesis of the indole alkaloid ellipticine is described, the last step of which follows a possible biogenetic pathway.
15 citations
TL;DR: X-ray crystallography showed that Aristoteline, the main alkaloid of the New Zealand plant Aristotelia serrata, has the novel indole structure (I) as discussed by the authors.
Abstract: X-Ray crystallography shows that aristoteline, the main alkaloid of the New Zealand plant Aristotelia serrata, has the novel indole structure (I).
14 citations
TL;DR: Under acidic conditions dihydromancunine (2) can be obtained directly from 3β-dihydrovincoside (1c) by cyclisation of N-4 to C-21, whereas 3α-strictosidine (1a) affords a novel N-1 cyclised derivative, nacycline (6).
Abstract: Under acidic conditions dihydromancunine (2) can be obtained directly from 3β-dihydrovincoside (1c) by cyclisation of N-4 to C-21, whereas 3α-strictosidine (1a) affords a novel N-1 cyclised derivative, nacycline (6).
11 citations
TL;DR: The indole alkaloid oxogambirtannine (I) was synthesised via photo-induced rearrangement of spiro as mentioned in this paper, which was shown to be photo-sensitive.
Abstract: The indole alkaloid oxogambirtannine (I) was synthesised via photo-induced rearrangement of spiro-[5′- methoxyindan-1′-one-1,2′-(1,2,3,4-tetrahydro-β-car-boline)].
7 citations
2 citations
1 citations
TL;DR: The indole alkaloid oxogambirtannine (I) was synthesised via photo-induced rearrangement of spiro as mentioned in this paper, which was shown to be photo-sensitive.
Abstract: The indole alkaloid oxogambirtannine (I) was synthesised via photo-induced rearrangement of spiro-[5′- methoxyindan-1′-one-1,2′-(1,2,3,4-tetrahydro-β-car-boline)].
TL;DR: In this article, a novel synthesis of the indole alkaloid ellipticine is described, the last step of which follows a possible biogenetic pathway, followed by a possible bio-pathway.
Abstract: A novel synthesis of the indole alkaloid ellipticine is described, the last step of which follows a possible biogenetic pathway.