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Three novel monotetrahydrofuran annonaceous acetogenins from Annona montana.
Three new monotetrahydrofuran (mono-THF) acetogenins, anmontanins A-C (1-3) were isolated from the leaves of Annona montana. Anmontanin C (3) is the first stereochemically pure acetogenin reported to
Limonoids from Swietenia macrophylla and S. aubrevilleana.
TLDR
An investigation of the seeds of Swietenia macrophylla and S. aubrevilleana (Meliaceae) finds three new compounds, augustineolide, which were subjected to an antifeedant bioassay on the final instar larvae of Spodoptera frugiperda and were comparable to that of bicyclononanolides previously tested.
Identification of new limonoids from Swietenia and their biological activity against insects.
TLDR
This work shows that limonoid analogs prepared through semi-synthesis can be used as lead compounds for the development of new insecticides.
7α,11β-diacetoxydihydronomilin, a new tetranortriterpenoid from cedrela mexicana
Abstract Spectroscopic and chemical evidence is presented in support of the structure of 7α,11β-diacetoxydihydronomilin (I) obtained from a benzene extract of the dehisced fruit capsules of Cedrela
Methyl briareolate, the first briarein diterpene containing a C-19 methyl ester
Abstract The structure 1 was elucidated by 2D NMR and X-ray crystal-structure analysis, which also established the relative stereochemistry. This is the first briarein diterpene containing a C-19
Further briareolate esters and briareolides from the Caribbean gorgonian octocoral Briareum asbestinum
Abstract Eight new diterpenes were isolated from Briareum asbestinum collected off south-west Tobago. Six metabolites (4) – (9) are briareolate esters while (10) and (11) are related to the
LYCOPODIUM ALKALOIDS: PART IV. ALKALOIDS OF JAMAICAN LYCOPODIUM CLAVATUM LINN.
Seven alkaloids have been isolated from L. clavatum Linn. collected in Jamaica, clavolonine C16H25NO2, fawcettiine C18H29NO3, base A (now named fawcettimine), lycopodine, dihydrolycopodine, and L.2
LYCOPODIUM ALKALOIDS: PART VIII. NEW ALKALOIDS FROM JAMAICAN LYCOPODIUM SPECIES
Four more alkaloids have been isolated from Lycopodium fawcettii. Lycodine and des-N-methyl-α-obscurine have been found in other Lycopodium species but base L, C18H31NO4, and base R, C16H24N2O2, are
Tetranortriterpenoids from Ruagea glabra
TLDR
Six tetranortriterpenoids including four new compounds, ruageanins A, B, C, and D, were isolated from fruits of Ruagea glabra (Meliaceae) and showed significant antifeedant activity to the final instar larvae of Spodoptera frugiperda.
Oxazoline Mediated Routes to a Unique Amino-acid, 4-Amino-13-carboxy[2.2]paracyclophane, of Planar Chirality
Abstract Efficient syntheses leading to 4-amino-13-carboxy[2.2]paracyclophane and derivatives are described. Novel oxazolinyl[2.2]paracyclophanes are used as intermediates and the oxazolinyl and
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