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Pregna-5,20-dien

The solanum alkaloids solafloridine (431a) and 25-iso-solafloridine (432) have been prepared by a multi-step synthesis from 3)8,16a-diacetoxy-20-(5-methyl-2-pyridyl)pregna-5,20-diene (428). The pyridine ring of compound... [Pg.491]

Chemical Name 160 ,17a-Cyclopentylidenedioxy-90 -fluoro-11/3,21-dihydroxy-1,4-pregna-diene-3,20-dione-21 -acetate... [Pg.55]

Crystallization from acetone-petroleum ether gave 13 mg of colorless needles of A. -pregna-diene-9a-fluoro-11/3,16a,17a,21-tetrol-3,20-dione 16,21-diacetate melting point (Kbfier block) about 150° to 240°C with apparent loss of solvent at 150°C. Recrystallization from acetone-petroleum ether did not alter the melting point. [Pg.1525]

Li added to a soln. of biphenyl in tetrahydrofuran, stirred 2.5 hrs. at room temp, temp, under Ng, cooled to -65°, 3-oxo-lla-hydroxy-20-ethylenedioxy-z i.4-pregna-diene added, stirred 45 min. at -65 to -60°, NH4-chloride added, and stirring continued 3 hrs. 3-oxo-lla-hydroxy-20-ethylenedioxy-Zl - pregnene. Y >90%. F. e. s. P. Wieland and G. Anner, Helv. 51, 1698 (1968). [Pg.299]

C,H,03CI,F 9a, ll -dichloro-21-fluoro-lYa-hydroxy-l, 4-pregna-diene-3,20-dione A — Corynebacterium simplex — — R-756... [Pg.123]

C22H27O4F 9a-fluor 0 -11/3,17a -dihydroxy-16-methylene-l, 4-pregna-diene-3,20-dione 1 A — Bacillus sphaericus 271-275 +30fe] B-68... [Pg.191]

C H ACl 16-chloromethylene-ll/3,17a, 21 -trihydroxy-1,4-pregna-diene-3,20-dione 1 A 48 Corynebacterium simplex 223-224 -34[d W-1084... [Pg.191]

C24H3,0,F 9c-fluoro-ll/3,16c, 17c, 21-tetrahydroxy-1,4-pregna-diene-3,20-dione 16,17-acetonide A Nocardia corallina H-399... [Pg.212]

See other pages where Pregna-5,20-dien is mentioned: [Pg.356]    [Pg.208]    [Pg.463]    [Pg.187]    [Pg.263]    [Pg.448]    [Pg.112]    [Pg.282]    [Pg.67]    [Pg.218]    [Pg.856]    [Pg.599]    [Pg.2371]    [Pg.410]    [Pg.618]    [Pg.312]    [Pg.123]    [Pg.123]    [Pg.124]    [Pg.129]    [Pg.130]    [Pg.131]    [Pg.133]    [Pg.133]    [Pg.133]    [Pg.134]    [Pg.135]    [Pg.135]    [Pg.135]    [Pg.135]    [Pg.136]    [Pg.136]    [Pg.136]    [Pg.190]    [Pg.191]    [Pg.191]    [Pg.191]    [Pg.192]    [Pg.192]    [Pg.192]    [Pg.195]    [Pg.196]    [Pg.199]    [Pg.203]    [Pg.205]    [Pg.219]    [Pg.298]    [Pg.309]   
See also in sourсe #XX -- [ Pg.3 , Pg.218 ]



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