Results 101 to 110 of about 598 (175)

Sintesis de 6-bromo-16-beta-metil-17-alfa propioniloxi-4,6-pregnadien-3, 20 diona

, 1999
openaire   +1 more source

The microbial dehydrogenation of some pregnanes and allopregnanes to 1.4-pregnadienes

Archives of Biochemistry and Biophysics, 1958
T.H. Stoudt, W. J. McAleer, Mieczysław Kozłowski, Virginia Marlatt   +3 more
semanticscholar   +4 more sources

Polyunsaturated monoglycerides and a pregnadiene in defensive glands of the water beetle Agabus affinis

Lipids, 2000
AbstractIn addition to the C21 steroid 15α‐hydroxypregna‐4,6‐dien‐3,20‐dione, four 1‐ or 2‐acylated polyunsaturated monoglycerides, 1‐ or 2‐(cis‐5,8,11,14‐eicosatetraenoyl)‐glycerol and 1‐ or 2‐(cis‐5,8,11,14,17‐eicosapentaenoyl)glycerol were identified as constituents of the prothoracic defensive gland secretion of the dytiscid beetle Agabus affinis ...
Otmar Schaaf, Konrad Dettner
openalex   +4 more sources

ADRENAL CORTICOID ACTIVITIES OF 9α-FLUOROllβ,16α7α,21-TETRAHYDROXY-l,4-PREGNADIENE-3,20-DIONE123¹,²,³

Journal of the American Chemical Society, 1959
AbstractThe title compound 17α,21‐dihydroxy‐1,4‐pregnadiene‐3,20‐dione crystallizes in the orthorhombic space group P 212121 with four molecules in the unit cell and the lattice parameters a = 7.727, b = 10.095, c = 22.876 Å. The crystal structure was determined by direct methods and refined by full matrix least squares calculations up to the ...
Perrine Jullien, L. Bortle, E Heyder, Ruth Partridge, ED Ross, I. Ringler   +5 more
  +5 more sources

Crystal and molecular structure of 17α‐acetoxy‐21‐hydroxy‐1,4‐pregnadiene‐3,20‐dione

Crystal Research and Technology, 1990
AbstractThe title compound 17α‐acetoxy‐21‐hydroxy‐1,4‐pregnadiene‐3,20‐dione crystallizes in the orthorhombic space group P 212121 with four molecules in the unit cell and the lattice parameters a = 10.950, b = 11.857, c = 15.634 Å. The crystal structure was determined by direct methods and refined by full matrix least squares calculations up to the ...
D. Scharfenberg‐Pfeiffer, R. Megges, Martin Bohl, K. Simon, Heinz Stopsack   +4 more
openalex   +2 more sources

Reduction of 17.alpha.-hydroxy-20-keto steroids: convenient synthesis of (E)-3.beta.-hydroxy-5,17(20)-pregnadiene 3-pivaloate and (Z)-3.beta.,16.alpha.-dihydroxy-5,17(20)-pregnadiene 3-pivaloate

The Journal of Organic Chemistry, 1990
Reduction of the 20-keto group of both 17α-hydroxy- and 16α~alkoxy-17α-hydroxy steroids has been examined with various hydride reagents in a number of different solvent sytems. For each of these steroids, specific conditions have been established to cleanly reduce to (20R)-17α,20-α-diols.
Brian K. Shull, Masato Koreeda
openalex   +2 more sources