Results 141 to 150 of about 9,122 (180)

Heterocyclic steroids V. 2,4-diaza steroids

Steroids, 1964
Abstract A new route to methyl 17β-acetoxy-1,5-seco-2,3,4-trisnorestr-5-one-1-oate has been developed. This β-ketoester has been used for the synthesis of steroidal pyrimidines.
D.M. Piatak, E. Caspi
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Novel heterocyclic steroidal amines

Journal of the Chemical Society D: Chemical Communications, 1969
Interrelated photochemical and thermal reaction sequences are outlined with novel stereochemical or other mechanistic features leading to derivatives of 6β,19-imino-5α- and -5β-cholestanes (I and II) and a range of aza-steroids such as (VIII) containing 2-methylpiperidine residues.
A. M. Farid, J. McKenna, J. M. McKenna, E. N. Wall   +3 more
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Total synthesis of heterocyclic steroids

J. Chem. Soc., Perkin Trans. 1, 1983
The total synthetic approach developed initially for natural steroids, and used for the preparation of A-nor compounds, has been extended to the preparation of novel heterocyclic steroids. The easily accessible 3,4-dinor-2,5-seco-9α-estrane-1,5,17-trione (9a) was treated with hydrazine hydrate, urea, and hydroxylamine hydrochloride to provide the 1 ...
Yu Ding, Bahman Nassim, Pierre Crabbé
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ChemInform Abstract: SYNTHESIS OF STEROIDAL HETEROCYCLES

Chemischer Informationsdienst, 1978
AbstractReview: Ausführliches Übersichtsreferat über die Synthese von heterocyclische Ringe enthaltenden Steroid‐Systemen.
A. V. KAMERNITZKY, A. M. TURUTA
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Some steroid heterocycles via enamines

Journal of the Chemical Society C: Organic, 1969
Reactions of steroid enamines with suitably substituted aromatic aldehydes have been used to synthesize steroid derivatives with a heterocyclic system joined to C-2 and C-3. Enamines from 3-keto-steroids and o-hydroxybenzaldehydes yield steroid adducts which contain the fused benzopyran nucleus.
M. S. Manhas, J. R. McCoy
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ChemInform Abstract: Synthesis of Heterocyclic Steroids

ChemInform, 1991
AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
P. CATSOULACOS, G. PAIRAS
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Heterocyclic steroids. X. 2‐Aza‐4‐oxa‐steroid analogs

Journal of Heterocyclic Chemistry, 1967
AbstractTwo 2‐aza‐4‐oxa steroids have been synthesized from acid Ia. In addition the Beckmann rearrangement of the C‐1 amide Ij has been explored.
D. M. Piatak, E. Caspi
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Preparation and androgenic activity of novel heterocyclic steroids

Experientia, 1970
Die Darstellung verschiedener A-Nor-5α-androstan-Verbindungen, die im A-Ring ein Schwefel-, Selen- oder Tellur-Atom haben, wird beschrieben. Sie besitzen, im Gegensatz zu den entsprechenden Oxa-Verbindungen, anabol-androgene Aktivitat. 2, 3-Dithia-5α-androstan-17β-ol-Acetat hatte ebenfalls hohe anabol-androgene Wirksamkeit.
M E, Wolff, G, Zanati
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DERIVATIVES OF STEROIDS WITH CONDENSED HETEROCYCLES

Russian Chemical Reviews, 1967
CONTENTS I. Introduction 311 II. Five-membered heterocycles with one heteroatom 312 III. Five-membered heterocycles with two heteroatoms 314 IV. Five-membered heterocycles with three heteroatoms 319 V. Six-membered heterocycles with one heteroatom 320 VI. Six-membered heterocycles with two heteroatoms 320 VII.
A A Akhrem, Yu A Titov
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STEROIDS: PART I. THE SYNTHESIS OF SOME HETEROCYCLIC STEROID DERIVATIVES

Canadian Journal of Chemistry, 1960
Cyanoacetamide reacted with 3β-hydroxy-16-hydroxymethylene-5-androsten-17-one to form 1-cyano-2-hydroxy-2(16′-3′β-hydroxy-17′-oxo-5′-androstenyl) propionamide or 3-cyano-4,5-dehydro-6-hydroxy-5,6(16′,17′-3′β-hydroxy-5′-androstenyl)-2-piperidone depending on whether a catalytic or a molecular amount of piperidine was used as the basic condensing agent.
Barbara G. Ketcheson, Alfred Taurins
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