H VI11 talllzed from acetic acid: mp 206 OC; yield 65%. The IR spectrum of VI11 shows a broad band at 3200 cm-'(3 NH). The'H NMR of compound VI11 showed the methyl groups as two singlets at 6 2.35 (3 H) and 6 2.85 (3 H), the= CH proton at 6 6.15 (1 H), the two CH protons as a singlet at 6 4.2 (2 H), the three NH protons at 6 9.5 (3 H), and the aromatic protons as a multiplet in the 6 7.45-8.15 region (10 H).
