Results 221 to 230 of about 64,198 (266)

A Concise Route to (+)-Estrone

Organic Letters, 2000
A concise route to the Torgov diene, the key intermediate of estrone, has been devised using a chiral dioxycyclopentenone as the starting material by employing a sequence of five steps of reactions involving a Lewis acid-mediated Diels-Alder reaction with Dane's diene.
, Tanaka, , Nakashima, , Taniguchi, , Ogasawara   +3 more
openaire   +2 more sources

Formal Enantioselective Synthesis of (+)-Estrone

Organic Letters, 2007
A formal total synthesis of (+)-estrone (4% overall yield; ca. 12 steps) could be achieved via the Torgov diene. An asymmetric allylic substitution is the key step for the construction of the chiral quaternary carbon center of a synthetic intermediate which was converted in four steps to the Torgov diene. [reaction: see text]
Darunee, Soorukram, Paul, Knochel
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RADIOIMMUNOASSAY OF ESTRONE AND ESTRADIOL

Acta Endocrinologica, 1970
ABSTRACT Antibodies to estradiol were produced by immunization of sheep with 17β-estradiol-succinyl-BSA. The antiserum cross reacted readily with estrone and was used for radioimmunoassay of plasma estrone and estradiol. The method includes ether extraction, separation of estrone and estradiol by Sephadex LH-20 column chromatography and radio ...
G, Mikhail, C H, Wu, M, Ferin, R L, Vande Wiele   +3 more
openaire   +2 more sources

Chiral Hydrogenation of Estrone and Estrone-3-Methyl Ether

1995
We have previously studied the use of enantiomeric chiral reducing agents in solution to control the direction of the hydrogenation of the keto group of estrone and estrone-3-methyl ether [1]. The complex catalysts chiral hydrosilane-rhodium-( +)- or (-)-DIOP or (+)- or (-)-BINAP allowed different stereoselectivities in the formation of the 17α- and ...
Gy Göndös, Gy Wittmann, M. Bartók, J. C. Orr   +3 more
openaire   +1 more source

Radiolysis of Estrone and Estradiol

Science, 1965
Gamma irradiation of estrone and estradiol in 1 N aqueous sodium hydroxide results in the formation of 2-hydroxyestrone and 2-hydroxyestradiol, respectively. Estrolactone (16a-oxa-D-homoestrone) was not encountered.
O H, Wheeler, R, Montalvo
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Estrone sulfate, estrone and estradiol concentrations in normal and cirrhotic postmenopausal women

Steroids, 1983
Circulating levels (mean +/- SD) of estrone sulfate (E1S), estrone (E1) and estradiol-17 beta (E2) were measured in normal and cirrhotic postmenopausal women matched for body weight and age. In cirrhotic postmenopausal women, the E1S concentrations (201 +/- 46 pg/ml), while both E1 and E2 levels showed an increase (46 +/- 7 and 30 +/- 8 pg/ml) compared
V M, Jasonni, C, Bulletti, G F, Bolelli, F, Franceschetti, M, Bonavia, P, Ciotti, C, Flamigni   +6 more
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Estrone sulfatase versus estrone sulfotransferase in human breast cancer: potential clinical applications

The Journal of Steroid Biochemistry and Molecular Biology, 1999
Estrone sulfate (E1S) is concentrated in high levels in human breast cancer tissue. The values are particularly high in postmenopausal women and many times those circulating in the plasma. Also, the tissular concentration of this conjugate are significantly higher in tumoural tissue than in the area of the breast considered as normal.
J R, Pasqualini, G S, Chetrite
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Formation of chlorinated estrones via hypochlorous disinfection of wastewater effluent containing estrone

Chemosphere, 2007
Chlorinated derivatives of estrone (E1) in the effluent of a municipal sewage treatment plant located in Shizuoka prefecture, Japan were detected by gas chromatography/mass spectrometry using electron impact in selected ion monitoring (GC/MS-EI-SIM) analysis.
Hideyuki, Nakamura, Ryoko, Kuruto-Niwa, Mitsuo, Uchida, Yoshiyasu, Terao   +3 more
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Estrone sulphate and estrone splanchnic extraction in postmenopausal women.

Acta Europaea fertilitatis, 1983
The splanchnic extraction of estrone sulphate (E1 S) and estrone (E1) was calculated in post-menopausal women undergoing cardiac catheterization for diagnostic purposes. The results showed a net uptake for E1 by the splanchnic area, liver included, whereas the splanchnic extraction of E1 S was not similar for each subject.
V M, Jasonni, C, Bulletti, M, Bonavia, F, Franceschetti, P, Ciotti, G, Fuschini, A, De March, L, La Marca, C, Flamigni   +8 more
openaire   +1 more source

Effect of natural aquatic humic substances on the photodegradation of estrone.

Chemosphere, 2016
C. Silva, D. L. Lima, M. B. Groth, M. Otero, V. Esteves   +4 more
semanticscholar   +1 more source