Results 171 to 180 of about 6,926 (218)

Erythrina—Chemical and Pharmacological Evaluation II: Alkaloids of Erythrina variegata L

Journal of Pharmaceutical Sciences, 1972
Eight spiroamine alkaloids (I-VIII) and three carboxylated indole-3-alkylamines (IX-XI) were isolated from the various parts of Erythrina variegata, and their identity was established by chemical and spectral (UV, IR, NMR, and mass) methods. Of the eight spiroamine bases isolated, three (I, VI, and VII) were previously unreported in nature, while ...
S K Bhattacharya
exaly   +3 more sources

Erythrina and Related Alkaloids

2010
The chemistry of Erythrina and related alkaloids from 1996 through to mid-2009 has been reviewed, with a particular focus on the preparation of Erythrina alkaloids possessing an aromatic D ring. A number of synthetic approaches to alkaloids bearing an aromatic D ring have been reported, including some asymmetric routes.
Andrew F, Parsons, Matthew J, Palframan
openaire   +2 more sources

Dimeric Erythrina alkaloids as well as their key units from Erythrina variegata

Phytochemistry, 2022
Ten dimeric and two monomeric Erythrina alkaloids, all of them are undescribed, were isolated from the bark of Erythrina variegata L. and named as erythrivarines O-Z. Their structures were determined on the basis of NMR and UV-spectroscopy and mass spectrometry.
Yu-Ting Tang, Jing Wu, Mei-Fen Bao, Qin-Gang Tan, Xiang-Hai Cai   +4 more
openaire   +2 more sources

Synthesis Pathways to Erythrina Alkaloids and Erythrina Type Compounds

ChemInform, 2007
AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
openaire   +2 more sources

Two Erythrina alkaloids and three diarylpropanoids from Erythrina velutina

Tetrahedron, 2021
Abstract Two new Erythrina alkaloid glycosides, 1 and 2, and three new diarylpropanoid glycosides 12–14 together with nine known compounds were isolated from the MeOH extracts of the seeds of Erythrina velutina. The structures and absolute configurations of these new compounds were elucidated through comprehensive spectroscopic analyses as well as ...
Kazuyuki Todoroki, Mariko Funasaki, Tadahiro Etoh, Keiichi Matsuzaki, Ayumi Ohsaki   +4 more
openaire   +1 more source

Quadrastichus erythrinae (Erythrina gall wasp).

2021
Abstract Unusual growths, caused by Erythrina gall wasp (Quadrastichus erythrinae), on leaves and young shoots of coral trees (Erythrina spp). alerts to the presence of this emerging invasive species. Quadrastichus erythrinae measures a mere 1.5 mm and may be spread easily via infected leaves from infected Erythrina specimens.
openaire   +1 more source

Dimeric Erythrina Alkaloids from the Flower of Erythrina variegata

Organic Letters, 2014
Unprecedented dimeric Erythrina alkaloids, spirocyclic (6/5/6/6) erythrivarine A (1) and spiro-fused (6/5/7/6) rings erythrivarine B (2), were isolated from the cultivated plant, E. variegata. The structures were determined on the basis of 1D and 2D NMR, FTIR, UV, and mass spectroscopic data and X-ray crystal diffraction. The biogenetic relationship of
Bing-Jie, Zhang, Mei-Fen, Bao, Chun-Xia, Zeng, Xiu-Hong, Zhong, Ling, Ni, Ying, Zeng, Xiang-Hai, Cai   +6 more
openaire   +2 more sources

Anticonvulsant activity of hydroalcoholic extracts from Erythrina velutina and Erythrina mulungu

Journal of Ethnopharmacology, 2007
The anticonvulsant effects of hydroalcoholic extracts (HAEs) from the stem bark of Erythrina velutina and Erythrina mulungu on pentylenetetrazole (PTZ) and strychnine-induced seizure tests and the potentiation of pentobarbital-induced sleeping time in mice with the extracts were examined in this study.
Silvânia M M, Vasconcelos, Natália M, Lima, Gabriel T M, Sales, Geanne M A, Cunha, Lissiana M V, Aguiar, Edilderto R, Silveira, Alexandre C P, Rodrigues, Daniele S, Macedo, Marta Maria F, Fonteles, Francisca Cléa F, Sousa, Glauce Socorro B, Viana   +10 more
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Synthesis of the Erythrina Alkaloid Erysotramidine

The Journal of Organic Chemistry, 2014
A concise synthesis of erysotramidine (an alkaloid belonging to the erythrina family) was achieved starting with an inexpensive phenol and amine derivative. The synthesis is based on oxidative phenol dearomatizations mediated by a hypervalent iodine reagent and includes a novel route to a key indolinone moiety.
Chloé, L'Homme, Marc-André, Ménard, Sylvain, Canesi   +2 more
openaire   +2 more sources

Extractives from Erythrina eriotriocha

Journal of Natural Products, 1990
From the stem bark of Erythrina eriotriocha, a novel isoflavone, eriotriochin has been isolated and characterized, in addition to known compounds auriculatin, dihydroauriculatin, and 3'-O-methylorobol. The structure of compound 1 was determined by COSY, selective INEPT, 2D HMBC, NOESY, DEPT, and other spectroscopic techniques.
A E, Nkengfack, Z T, Fomum, R, Ubillas, D R, Sanson, M S, Tempesta   +4 more
openaire   +2 more sources