Big Chemical Encyclopedia

Chemical substances, components, reactions, process design ...

Articles Figures Tables About

Zephyranthes Candida

Zephyranthes Candida Herbert Cong Lan (White zephyrlily) (aerial part) Lycorine, haemanthidien, nerinine, taxettin.50 For convulsion, hepatitis. [Pg.173]

Zephyranthes Candida Herbert (Tai w[Pg.344]

Clivia miniata, Hippeastrum hybridum, Lycoris radiata, L. longituba, L. aura, Narcissus tazetta, Zephyranthes Candida Lyonia ovalifolia... [Pg.450]

An inversion mechanism had been previously observed in the hydroxylation of caranine (2) to lycorine by Wildman and Heimer. They observed 7% incorporation of [2/ -3H] caranine into lycorine in Zephyranthes Candida Herb., the 3H being retained at C-2 of 1 as shown by the conversion into the inactive 385. The stereospecifically labeled precursor was obtained through LiAl3H4 reduction of lycorine-1,2-a-epoxide prepared from lycorine via its cis-chlorohydrin and chromatography on Florisil. The structure of the a-epoxide rests on physical and chemical grounds, whereas the stereochemistry of the... [Pg.148]

Nerinine was isolated from Nerine samiensis and shown to possess the empirical formula C19H25NO5 (70). Analysis of the alkaloid showed the presence of three methoxyls and one N-methyl group. Subsequently, nerinine was isolated from Zephyranthes Candida by Boit and Ehmke... [Pg.336]

Zephyranthine (mp 201°-202° [ajj, —43.2° in CHCI3) was isolated from Zephyranthes Candida. It forms a picrate (mp 194°-195°) and a methiodide (mp 294°-295° decomp.). It is stable to catal3dic hydrogenation but forms an 0,0-diacetate and an isopropylidene derivative. The alkaloid is identical with a-dihydro-2-epilycorine (XIV R = OH) (63). [Pg.334]

See other pages where Zephyranthes Candida is mentioned: [Pg.433]    [Pg.458]    [Pg.488]    [Pg.149]    [Pg.369]    [Pg.402]    [Pg.428]    [Pg.351]    [Pg.108]    [Pg.433]    [Pg.458]    [Pg.488]    [Pg.149]    [Pg.369]    [Pg.402]    [Pg.428]    [Pg.351]    [Pg.108]   
See also in sourсe #XX -- [ Pg.160 , Pg.331 , Pg.420 , Pg.437 , Pg.445 , Pg.475 ]

See also in sourсe #XX -- [ Pg.320 ]



SEARCH



Candida

Zephyranthes

© 2024 chempedia.info