... J. Heterocyclic Chem., 21, 673 (1984). ... performed with a Waters Associates model 204 and mo- del 440 absorbance detector (column, Develosil ODS-10, 0.3 X 4 mm id, Nomura Chemical Co.; mobil ... d,d, Jfl4 jf5 = 8.5 Hz, Jj{4 p = 7.0 Hz, H-4), 7.27 (IH, d,d, Jh4,H5 = 8-5 Hz, j'h5,F ...