3-Amidylphthalides (5). Oxidation of l-Hydroxy-3-amidylphthalans.-All oxidations were carried out using the procedure described above for oxidation of compounds of structure 1. Ice bath conditions were employed. Products were re crystallized from acetonitrile. Yields ranged from 50-60%.Oxidation of 2a and 2b.-The product in both cases was 5b: mp 175-176°; ir (cm"1) 3257 (NH), 1748 (phthalide C=0), 1626 (amide C==0), 755, 688, 745 (CH out-of-plane deformation);nmr (DMSO-de) r 2.68 (d, 1,
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