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Tecoma

Lapacol [84-79-7] (Cl Natural Yellow 16 Cl 75490) (lapachic acid, taiguie acid, tecomin) is a yellow pigment occurring in the wood of trees of the genus Tecoma native to the West Indies and tropical South America. The shavings of the wood, treated with lime water, give an extract that dyes cotton yellow. [Pg.397]

Mthatha Campus, Private Bag Executive Dean, Faculty of Science, Engineering and Technology Walter Sisulu University, Tecoma, East London... [Pg.163]

Costantino L, Raimondi L, Pirisino R, Brunetti T, Pessotto P, Giannessi F, Lins AP, Barlocco D, Antohni L, El-Abady SA. (2003) Isolation and pharmacological activities of the Tecoma stans alkaloids. 11 Farmaco 58 781-785. [Pg.584]

DiOH-6,4 -diOMe CiyHieOe 316 Tecoma stans Bignoniaceae Flower 28... [Pg.921]

A stereoselective synthesis of ( )-tecomanine (16), an alkaloid of Tecoma stans Juss., has been achieved and is outlined in Scheme 4.22... [Pg.40]

Gnaphalium semiamplexicaule (gordolobo) Tecoma stans (tronadora)... [Pg.292]

Skat ole (= 3-Methyl- Arum spp. (Araceae), Tecoma starts OD-R (faecal)... [Pg.418]

Tecoma stans,93 have been shown to catalyze the condensation of o-aminophenol to 2-amino-3i/-phenoxazin-3-one (52, R = H) to which the name questiomycin A has been given by Anzai et al.9i This compound has been isolated also from Streptomyces fungicidicus,9 and, along with 2-acetylamino-3i/-phenoxazin-3-one (52, R = COCH3), from members of the actinomycete genus Waksmania.96... [Pg.110]

The crystal structures and absolute stereochemistry of tecomanine (21) and alkaloid-C (22), occurring in Tecoma starts, have been settled by X-ray diffraction analysis of their respective methoperchlorate and methiodide salts. In the latter case the results reveal the position of the angular hydroxy-group, hitherto not known with certainty. [Pg.40]

Lins, A. P. and Felicio, J. D. (1993) Monoterpene alkaloids from Tecoma starts. Phytochemistry, 34, 876-878. [Pg.359]

A new monoterpene alkaloid, kinabalurine G (330) has been obtained from the leaf extract of Kopsia dasyrachis in addition to 11 known alkaloids and the novel pentacyclic indole, danuphylline vide infra) [223]. Analysis of the spectral data allowed assignment of the gross structure as well as determination of the stereochemistry at the various centers. Kinabalurine G (330) is the AZ-oxide of 9-hydroxy-S-skytanthine, which is unknown, although a 9-hydroxy-skytanthine of unknown stereochemistry has been previously reported from Tecoma stans [224]. [Pg.419]

Reduced analogues of venoterpine include tecomanine (95), an alkaloid from Tecoma stans. The structure of this base is known from X-ray studies and a stereoselective synthesis of its racemic modification has been published (T. Imanishi,... [Pg.195]

The bark of Tecoma arequipensis (Bignoniaceae) yielded a major alkaloid, (-)-S-A-nor-methylskytanthine (32), [a]D -21.5°, whose structure was established through X-ray crystallographic analysis of the N-(4-bromophenylthiourea) derivative (36). Other alkaloids detected by GC-MS analysis included 5,6-dehydroskytanthine, skytanthine, actinidine, 5-hydroxy-skytanthine and tecomanine. Additional components were partially characterized (MS data only) as two hydroxytecomanines and four... [Pg.273]

Originally isolated as Alkaloid C by Jones and Dickinson (45), the structure was deduced to be that of a 5- or 9-hydroxy-skytanthine derivative, with the former structure preferred. To clarify this ambiguity the methiodide salt was subjected to X-ray crystallographic analysis (46,47), which showed that the isolate was 5/3-hydroxy-skytanthine (44). The same compound was also isolated from the fruits of Tecoma starts, and the proton and 13C NMR data were established (42). [Pg.278]

Tecomine was originally isolated from Tecoma stans in 1959 by Ham-mouda and Motawi (90) and subsequently by Jones and co-workers (45,91), who named the alkaloid tecomanine. Direct comparison of the alkaloids and their picrates established their identity (92). Therefore the former name, tecomine, should take precedence. However, current nomenclature in usage for the alkaloid and for its derivatives has favored the name tecomanine, and this name will be used here. [Pg.281]

The leaves of Tecoma stans (Bignoniaceae) were studied previously (1) because of their reputed antidiabetic properties, which appear to have been traced to the monoterpene alkaloid fraction. Further studies of this plant by Lins and D arc Felicio (42) have now revealed the presence of two new alkaloids, 7-hydroxy-5,6-dehydroskytanthine (58) and 4-hydroxy-tecoman-ine (59), in the fruits of T. stans. In addition, two known alkaloids, 5/3-hydroxy-skytanthine (44) and tecomanine (55) were obtained. H and 13C NMR data for these known alkaloids were reported for the first time. [Pg.281]


See other pages where Tecoma is mentioned: [Pg.553]    [Pg.678]    [Pg.527]    [Pg.969]    [Pg.30]    [Pg.298]    [Pg.722]    [Pg.24]    [Pg.9]    [Pg.553]    [Pg.103]    [Pg.28]    [Pg.17]    [Pg.722]    [Pg.53]    [Pg.18]    [Pg.263]    [Pg.263]    [Pg.263]    [Pg.263]    [Pg.263]    [Pg.264]    [Pg.282]    [Pg.301]    [Pg.302]   
See also in sourсe #XX -- [ Pg.9 ]

See also in sourсe #XX -- [ Pg.277 ]




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Tecoma stans

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