Edward W. Hagaman
Rice University
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Featured researches published by Edward W. Hagaman.
Tetrahedron Letters | 1980
Nicole Kunesch; André Cavé; Edward W. Hagaman; Ernest Wenkert
Abstract A 13 C NMR analysis of lochnericine and the new alkaloids peceyline, peceylanine and pelankine is presented and the structures of the indoline dimers described.
Tetrahedron | 1983
Andrew T. McPhail; Edward W. Hagaman; Nicole Kunesch; Ernest Wenkert; Jacques Poisson
Abstract The bis-indoline alkaloid callichiline and five of its derivatives were investigated by the 13C NMR spectral method and their C shifts assigned. This analysis and biogenetic considerations limited the alkaloid to two structures of which one was shown by a single-crystal X-ray crystallographic analysis of the natural base to be the actual structure of the alkaloid. Callichiline crystallizes in the monoclinic system, space group P21, with a = 8.776(3) A, b = 15.443(5) A, c = 14.145(5) A, β = 90.87(3)°, and Z = 2. Atomic positional and thermal parameters were refined by least-squares calculations to R = 0.052 over 2625 reflections measured by diffractometer.
Journal of The Chemical Society, Chemical Communications | 1973
Ernest Wenkert; Edward W. Hagaman; Leo A. Paquette; Robert E. Wingard; Ronald K. Russell
The 13C n.m.r. spectra of semibullvalene and a number of its annulated derivatives provide valuable information on the direction of the valence tautomeric equilibria in nondegenerate examples.
Magnetic Resonance in Chemistry | 1976
Edward W. Hagaman
Helvetica Chimica Acta | 1976
Ernest Wenkert; Edward W. Hagaman; Nicole Kunesch; Nai-yi Wang; Béla Zsadon
Helvetica Chimica Acta | 1975
Ernest Wenkert; Edward W. Hagaman; Bansi Lal; Gerald E. Gutowski; Allen S. Katner; Jean C. Miller; Norbert Neuss
Journal of the American Chemical Society | 1972
L. L. Martin; Heinz G. Floss; J. A. Mabe; Edward W. Hagaman; Ernest Wenkert
Tetrahedron Letters | 1976
Jean Bruneton; André Cavé; Edward W. Hagaman; Nicole Kunesch; Ernest Wenkert
ChemInform | 1977
I. Rolland; Nicole Kunesch; Jacques Poisson; Edward W. Hagaman; F. M. Schell; Ernest Wenkert
ChemInform | 1977
Ernest Wenkert; Edward W. Hagaman; Nicole Kunesch; N. Wang; B. Zsadon