An Efficient Preparation of (22E,24S)-5α-Stigmasta-2,22-dien-6-one from (22E,24S)-3α,5-Cyclo-5α-stigmast-22-en-6-one
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چکیده
منابع مشابه
(22E,24R)-3α,5-Cyclo-5α-ergosta-22-en-6-one
In the title mol-ecule, C(28)H(44)O, the two six-membered rings have a chair conformation and the two five-membered rings haveenvelope conformations. The crystal packing exhibits no short inter-molecular contacts. The absolute configuration was assigned to correspond with that of the known chiral centres in a precursor molecule, which remained unchanged during the synthesis of the title compound.
متن کامل(22E,24R)-5α-Ergosta-2,22-dien-6-one
In the title mol-ecule, C(28)H(44)O, two six-membered rings have regular chair conformations, while the six-membered ring containing the C=C double bond exhibits a distorted chair conformation. The five-membered ring adopts an envelope conformation. In the crystal, weak inter-molecular C-H⋯O inter-actions link mol-ecules into chains along the b axis. The absolute configuration was assigned to c...
متن کامل5α-Pregna-1,20-dien-3-one
The title compound, C(21)H(30)O, was isolated from the soft coral Sinularia sp. The mol-ecule contains four alicyclic rings, all trans-fused, among which three six-membered rings are in different distorted chair conformations while a five-membered ring assumes an envelope form.
متن کامل3β-Chloro-5α-cholestan-6-one
The asymmetric unit of the title compound, C(27)H(45)ClO, consists of two crystallographically independent mol-ecules. In both mol-ecules, the three cyclo-hexane rings in the steroid fused-ring systems adopt chair conformations, while the cyclo-pentane ring adopts a half-chair conformation in one mol-ecule and an envelope conformation in the other. In the crystal, the mol-ecules are linked into...
متن کامل(22E,24R)-3β,5α,9α-Trihydroxyergosta-7,22-dien-6-one monohydrate
The title ergosterol compound, C(28)H(44)O(4)·H(2)O, is composed of four fused rings (three six-membered and one five-membered) and a side chain. It is a derivative of ergosterol and was isolated from a marine-derived halotolerant fungus, Cladosporium cladosporioides PXP-49. In the crystal, mol-ecules are assembled by classical O-H⋯O hydrogen bonds, forming a two-dimensional network, with base ...
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ژورنال
عنوان ژورنال: Agricultural and Biological Chemistry
سال: 1988
ISSN: 0002-1369
DOI: 10.1080/00021369.1988.10868959