Results 301 to 310 of about 839,062 (317)

Absolute configuration of neostenine

Journal of Molecular Structure, 2010
Abstract Heavy atoms bromine and iodine were incorporated into the neostenine ( 1 ) skeleton through reductive cleavage of the lactone ring, followed by acylation with 4-bromobenzoyl chloride, and salt formation with methyl iodide, respectively. The absolute configuration of the seven chiral centers C1, C9, C9a, C10, C11, C1 and C13 in 1 were ...
Ren-Wang Jiang, Wencai Ye, Pang-Chui Shaw, Paul Pui-Hay But, Thomas C.W. Mak   +4 more
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Absolute configurations of isoflavans

Phytochemistry, 1978
Abstract The absolute configurations of isoflavans and isoflavanquinones isolated from Cyclolobium, Dalbergia and Machaerium species were established by comparison of their ORD curves with that of (3S)-5,7,3′,4′-tetra-methoxyisoflavan and (3S)-7,4′-dimethoxyisoflavan-2′,5′-quinone, respectively.
Kazu Kurosawa, W.David Ollis, Brian T. Redman, Ian O. Sutherland, Herbert M. Alves, Otto R. Gottlieb   +5 more
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Absolute configuration of aleuriaxanthin

Phytochemistry, 1976
Abstract The chirality of aleuriaxanthin ex Aleuria aurantia has been shown to be 2′ R by means of the modified Horeau method. Other carotenoids with terminal methylene in an acylic end group were not detected in A. aurantia .
Richard Bucheckert, Noël Arpin, Synnøve Liaaen-Jensen   +2 more
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Absolute Configuration of Gilmaniellin

Helvetica Chimica Acta, 1984
AbstractThe absolute configuration of dechlorogilmaniellin (2) could be determined from its chiroptical data by applying coupled‐oscillator theory to the CD couplet around 272 nm and from the sign of its n →π* Cotton effect. Gilmaniellin (1) has the same absolute configuration.
GÜNther Snatzke, Christoph Tamm
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Absolute configuration of isocurcumenol

Acta Crystallographica Section C Crystal Structure Communications, 1999
The absolute configuration of isocurcumenol, C 15 H 22 O 2 was determined as (3α,3aα,6α,8aβ). The C=C double bonds in the 5-isopropylidene and 8-methylene groups were confirmed. The molecules are arranged by intermolecular hydrogen bonds between the hydroxyl groups to form helices about 3 2 screw axes.
J. W. Bats, S. H. Öhlinger
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Absolute configuration of conhydrine

Canadian Journal of Chemistry, 1969
Catalytic hydrogenation of optically active 2-pyridyl ethylcarbinol (1) formed the alkaloid conhydrine (2) stereospecifically. Application of the von Braun reaction gave conversion of (+)-conhydrine into R-(−)-3-octyl benzoate and of (−)-conhydrine into the S-(+)-antimer.
G. Fodor, E. Bauerschmidt, J. Cymerman Craig   +2 more
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Absolute configuration of acenocoumarin

Journal of Medicinal Chemistry, 1979
C R, Wheeler, W F, Trager
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Hexahelicene. Absolute configuration

Journal of the American Chemical Society, 1972
David A. Lightner, Daniel T. Hefelfinger, Thomas W. Powers, Gerard W. Frank, Kenneth N. Trueblood   +4 more
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Absolute Configuration

2017
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The absolute configuration of (-)-argemonine

Tetrahedron Letters, 1967
A C, Barker, A R, Battersby
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