Transformation of 6.BETA.-bromo-4,4-dimethyl-1.ALPHA.,2.ALPHA.-epoxy-3.ALPHA.,5.ALPHA.-oxidocholestane into 6.BETA.-bromo-4,4-dimethyl-3.ALPHA.,5.ALPHA.-oxido-5(10.RAR.1.BETA.H)abeo-10(19)-cholesten-2.ALPHA.-ol.
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چکیده
منابع مشابه
Limnol. Oceanogr., 44(4), 1999, 1019–1034
Dissolved and colloidal concentrations of Al, Fe, Mn, Cu, Zn, Cd, and Pb were determined in the Mullica River, New Jersey, and its tributaries on nine occasions between August 1994 and September 1995. Cross-flow filtration (CFF) at a nominal 10 kDa cutoff was used to separate total dissolved (,0.45 mm) riverine metals into colloidal and truly dissolved fractions. Reproducibility tests on full p...
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In the title compound, C(16)H(19)BrO(3)S, the cyclo-hexyl ring adopts a chair conformation. In the crystal, mol-ecules are linked through weak C-H⋯O hydrogen bonds and Br⋯O contacts [3.211 (1) Å].
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In the title compound, C(15)H(17)BrO(2)S, the cyclo-pentyl ring adopts an envelope conformation. In the crystal, mol-ecules are linked by weak C-H⋯O hydrogen bonds. A slipped π-π inter-action occurs between the furan and benzene rings of adjacent mol-ecules [centroid-centroid distance = 3.892 (3) Å and slippage = 1.786 (3) Å]. The crystal structure also exhibits a weak C-Br⋯π [2.919 (3) Å] inte...
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The title compound, C(19)H(20)BrNO(2), consists of a carbazole skeleton with methyl groups at positions 1 and 4, a protecting group located at the N atom and a Br atom at position 6. The pyrrole ring is oriented at dihedral angles of 1.27 (7) and 4.86 (7)° with respect to the adjacent benzene rings. The dihedral angle between the benzene rings is 5.11 (7). The crystal structure is determined ma...
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ژورنال
عنوان ژورنال: Agricultural and Biological Chemistry
سال: 1977
ISSN: 0002-1369,1881-1280
DOI: 10.1271/bbb1961.41.2109