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1
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84987280060
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Part 19 in the series Syntheses of Bile Pigments
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Part 19 in the series Syntheses of Bile Pigments. Part 18: Nesvadba, P.; Ngoc-Phan, D.; Nydegger, F.; Espinosa Ferao, A.; Gossauer, A. Helv. Chim. Acta 1994, 77, 1837.
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Nesvadba, P.1
Ngoc-Phan, D.2
Nydegger, F.3
Espinosa Ferao, A.4
Gossauer, A.5
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2
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Watson, C.J.1
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Lightner, D.A.4
Petryka, Z.J.5
Davis, E.6
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7
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Floch, L.; Nydegger, F.; Gossauer, A.; Kratky, C. Helv. Chim. Acta 1994, 77, 445.
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Floch, L.1
Nydegger, F.2
Gossauer, A.3
Kratky, C.4
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8
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0344734902
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Moscowitz, A.; Krueger, W. C. ; Kay, I. T.; Skaves, G.; Bruckenstein, S. Proc. Natl. Acad. Sci. U.S.A. 1964, 52, 1190.
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Moscowitz, A.1
Krueger, W.C.2
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Skaves, G.4
Bruckenstein, S.5
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9
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8244230998
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note
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6 partially resolved (+)-1a was transformed by reaction with (-)-(S)-1-(1-naphthyl)ethylamine into the corresponding N-[1-(1-naphthyl)ethyl]carboxamide, the absolute configuration of which at C(4) was determined by X-ray diffraction analysis to be R. Within the scope of the present work, enantiomerically pure carboxylic acid (-)-1a has been reacted with (+)-(R)-1-(1-naphthyl)ethylamine, yielding crystalline carboxamide 1c. The X-ray structure analysis of the latter, which has been carried out in the laboratory of Professor Christoph Kratky (Institut für Physikalische Chemie der Universität Graz, Austria) has unequivocally established the absolute configuration at C(4) as S.
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10
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8244220141
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A similar observation has been made with higher substituted 4-methyl-1,4,5,10-tetrahydro-11H-dipyrrinone derivatives (Spivey, A. C.; Caprettra, A.; Frampton, C. S.; Leeper, F. J.; Battersby A. R. J. Chem. Soc., Perkin Trans. 1 1966, 2091). We thank Prof. A. Battersby for the communication of his results, prior to publication.
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(1966)
J. Chem. Soc., Perkin Trans. 1
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Spivey, A.C.1
Caprettra, A.2
Frampton, C.S.3
Leeper, F.J.4
Battersby, A.R.5
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11
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0000912226
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Bonfiglio, J. V.; Bonnett, R.; Buckley, D. G.; Hamzetash, D.; Hursthouse. M. B.; Abdul Malik, K. M.; McDonagh, A. F.; Trotter, J. Tetrahedron 1983, 39, 1865.
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Tetrahedron
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Bonfiglio, J.V.1
Bonnett, R.2
Buckley, D.G.3
Hamzetash, D.4
Hursthouse, M.B.5
Abdul Malik, K.M.6
McDonagh, A.F.7
Trotter, J.8
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12
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8244257147
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Dekkers, H. P. J. M. See ref 32, pp 121-152
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Dekkers, H. P. J. M. See ref 32, pp 121-152.
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13
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8244264481
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note
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Private communication from Professor Harry P. J. M. Dekkers (Gorlaeus Laboratories, Department of Chemistry, The University of Leiden, The Netherlands). We are indebted to Professor Dekkers for measurements of the circular polarization of luminiscence of the difluoroboron chelates of urobilins 3 and 4.
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14
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0348206958
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Application of the optical activity to stereochemical determinations
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Kagan, H. B., Ed.; Vol. 2, Thieme Verlag: Stuttgart, Germany
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Legrand, M.; Rougier, M. J. Application of the optical activity to stereochemical determinations. In Stereochemistry, Fundamentals and Methods; Kagan, H. B., Ed.; Vol. 2, Thieme Verlag: Stuttgart, Germany, 1977; Vol. 2, pp 47-49.
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Legrand, M.1
Rougier, M.J.2
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0014874265
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Lightner, D. A.; Docks, E. L.; Horwitz, J.; Moscowitz, A. Proc. Natl. Acad. Sci. U.S.A. 1970, 67, 1361.
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Lightner, D.A.1
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Horwitz, J.3
Moscowitz, A.4
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16
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0000915841
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sp = syn-periplanar, sc = syn-clinal, ac = anti-clinal, and ap = anti-periplanar (cf. Klyne, W.; Prelog, V. Experientia 1960, 16, 521).
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(1960)
Experientia
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Klyne, W.1
Prelog, V.2
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17
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0000612740
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and references cited therein
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23
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13444269041
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GARP = globally optimized alternating-phase rectangular pulses (cf. Shaka, A. J.; Barker, P. B.; Freeman, R. J. Magn. Reson. 1985, 64, 547).
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8244232391
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note
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3 are identical.
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26
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33947474411
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(a) Moscowitz, A.; Mislow, K.; Glass, M. A. W.; Djerassi, C. J. Am. Chem. Soc. 1962, 84, 1945.
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29
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Circular Dichroism: Principles and Applications
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Nakanishi, K.1
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8244255735
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42
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8244226468
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note
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Assignments made in a 125.76 MHz COLOC spectrum.
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43
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8244246907
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note
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Assignments made in a 125.76 MHz HETCOR spectrum.
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