IR (KBr), ν (cm−1): 3272 (NH), 3042 (CH aromatic), 2934, 1458 (CH aliphatic), 1601 (C=N), 1512 (C–N), 686 (C–S). 1H NMR (Proteasome activity DMSO-d 6) δ (ppm): 4.11 (s, 2H, CH2), 4.73 (s, 2H, CH2), 7.34–7.62 (m, 15H, 15ArH), 10.47 (brs, 1H, NH). [5-Amino-(4-methoxybenzyl)]-2-[(4,5-diphenyl-4H-1,2,4-triazol-3-yl)sulfanyl]methyl-1,3,4-thiadiazole
RG-7388 in vivo (6i) Yield: 71.4 %, mp: 218–220 °C (dec.). Analysis for C25H22N6OS2 (486.61); calculated: C, 61.70; H, 4.56; N, 17.27; S, 13.18; found: C, 61.77; H, 4.55; N, 17.23; S, 13.22. IR (KBr), ν (cm−1): 3268 (NH), 3095 (CH aromatic), 2955, 1420, 765 (CH aliphatic), 1598 (C=N), 1508 (C–N), 690 (C–S). 1H NMR (DMSO-d 6) δ (ppm): 3.68 (s, 3H, CH3), 3.98 (s, 2H, CH2), 4.44 (s, 2H, CH2), 6.86–7.64 (m, 14H, 14ArH), 10.44 (brs, 1H, NH). Derivatives
of N,N-disubstituted acetamide (7a–i) General method (for compounds 7a–i) A mixture Adavosertib price of 10 mmol of appropriate 2,5-disubstituted-1,3,4-thiadiazole 6a–i in 5 mL of acetic anhydride was heated under reflux for 2 h. Distilled water was added to the reaction mixture and it was allowed to cool. The resulting precipitate was filtered and washed with distilled water. The residue was purified by recrystallization from ethanol. N-(5-[(4,5-diphenyl-4H-1,2,4-triazol-3-yl)sulfanyl]methyl-1,3,4-thiadiazol-2-yl)-N-ethylacetamide (7a) Yield: 75.6 %, mp: 182–184 °C (dec.). Analysis for C21H20N6OS2 (436.55); calculated: C, 57.78; H, 4.62; N, 19.25; S, 14.69; found: C, 57.81; H, 4.61; N, 19.28; S, 14.69. IR (KBr), ν (cm−1): 3091 (CH aromatic), 2922, 1467, 742 (CH aliphatic), 1701 (C=O), 1610 (C=N), 1512 (C–N), 692 (C–S). 1H NMR (DMSO-d 6) δ (ppm): 1.31 (t, J = 7.5 Hz, 3H, CH3), 2.15 (s, 3H, CH3), 3.65–3.70 (q, J = 5 Hz, J = 5 Hz, 2H, CH2), 4.44 (s, 2H, CH2), 7.33–8.04 (m, 10H, 10ArH). N-(5-[(4,5-diphenyl-4H-1,2,4-triazol-3-yl)sulfanyl]methyl-1,3,4-thiadiazol-2-yl)-N-allylacetamide (7b) Yield: 62.1 %, mp: 212–214 °C (dec.). Analysis for C22H20N6OS2
(448.56); calculated: C, 58.91; H, 4.49; N, 18.74; S, 14.30; found: C, 58.94; H, new 4.51; N, 18.76; S, 14.28. IR (KBr), ν (cm−1): 3122 (CH aromatic), 2978, 1492, 742 (CH aliphatic), 1708 (C=O), 1614 (C=N), 1515 (C–N), 688 (C–S). 1H NMR (DMSO-d 6) δ (ppm): 2.11 (s, 3H, CH3), 4.27 (s, 2H, CH2), 4.35 (d, J = 5 Hz, 2H, CH2), 5.14–5.18 (dd, J = 5 Hz, J = 5 Hz, 2H, =CH2), 5.81–5.86 (m, 1H, CH), 7.34–8.07 (m, 10H, 10ArH). N-(5-[(4,5-diphenyl-4H-1,2,4-triazol-3-yl)sulfanyl]methyl-1,3,4-thiadiazol-2-yl)-N-cyclohexylacetamide (7c) Yield: 87.5 %, mp: 193–195 °C (dec.).