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Hecogenine

Hecogenin has been used as starting material for the preparation of betamethasone (78) this genin is found in the sisal plant, sisalana. The... [Pg.102]

X0 group present in hecogenin (79) is transferred to C-11 (84). Bromination of hecogenin in ben2ene yields the lla,23a-dibromo derivative (80). The latter is treated with sodium hydroxide in aqueous /-butanol to yield the crystalline 23-bromo-ketal (81) which is acetylated and then debrominated with... [Pg.102]

A pilot plant ia India has been estabUshed to extract fiber, pulp, and juice from the leaves of sisal plants. The fiber is sold direcdy or used to manufacture rope, the cmshed pulp is used ia paper processiag, and the juice is an excellent source of hecogenin. During a three- to five-day fermentation of the juice, partial enzymatic hydrolysis causes hecogenin to precipitate as the hemisaponin ia the form of a fine sludge. This sediment is hydrolyzed with aqueous hydrochloric acid, neutralized, and filtered. This filter cake is washed with water and extracted with alcohol. The yield of hecogenin varies between 0.05 and 0.1% by the weight of the leaf (126). [Pg.427]

Dipterocarpol, hecogenin. Apply sample solution and moisten with 2,4-di- [16]... [Pg.71]

Hecogenin p-toluenesulfonylhydrazone, 402 Hofmann-Loffler reaction, 257 Homoallylic rearrangements, 379 A-homo-5a-cholestan-3-one, 356, 358, 362 A-homo-5a-cholestan-4-one, 359, 360, 368 A-homo-choIest-4a-en-3-one, 366 A-homo-estra-1(10), 2,4a-triene-4,17-dione, 367,370... [Pg.459]

Rosenkranz, G. Fortschr. Chem. Org. Naturst. (FCONAA) 10, 274 (1953). from hecogenin ... [Pg.547]

Ocetoxy-11,20-dioxo-16-pregnene (from hecogenin, cf. olfoxolone synthesis)... [Pg.870]

Halogen lamp la 22 Halogen oxyacids la 188,189 Haloperidol lb 268,354 Harmalin lb 188 Harpagophytum alkaloids lb 243 Harpagoside lb 243 Hecogenine la 71... [Pg.487]

Dipterocarpol, hecogenin, progesterone Apply sample solution and moisten with 2,4-di-nitrophenyihydrazine in acetic acid then spray with acetic acid and store at room temperature or 55°C for up to 1.5 h in a desiccator then dry at 80° C and chromatograph. [16]... [Pg.539]

The two major types of steroidal sapogenin are diosgenin and hecogenin. Steroidal saponins are used in the commercial production of sex hormones for clinical use. For example, progesterone is derived from diosgenin. [Pg.325]

Half-hydrogenated state, 112 2 -Halo-5a-cholestan-3-one, 349 TV-halogen amides and hydrogen fluoride, 454 Hecogenin, 45... [Pg.261]

Solv. Digitoxi- Gitoxi- Digoxi- Strop han- Deoxy- Tigogenin Diosgenin Hecogenin Smila- Sarsa-... [Pg.359]

See other pages where Hecogenine is mentioned: [Pg.419]    [Pg.427]    [Pg.428]    [Pg.448]    [Pg.254]    [Pg.36]    [Pg.45]    [Pg.301]    [Pg.402]    [Pg.403]    [Pg.435]    [Pg.57]    [Pg.1251]    [Pg.236]    [Pg.28]    [Pg.600]    [Pg.312]    [Pg.353]    [Pg.326]    [Pg.231]    [Pg.231]    [Pg.27]    [Pg.261]    [Pg.294]    [Pg.209]    [Pg.398]    [Pg.449]    [Pg.465]    [Pg.80]    [Pg.360]    [Pg.466]    [Pg.734]    [Pg.102]   
See also in sourсe #XX -- [ Pg.71 ]



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