15 A mixture of 6-chlorouracil (3) (2.92 g, 0.02 mol) and thiophenol (2.2 g, 0.02 mol) in dry pyridine (20 ml) was heated under Libraries reflux with stirring for 3 h and allowed to cool to room temperature. The mixture was then poured into ice water (500 ml) and the separated solid product was collected by filtration, washed

with water, dried and crystallized from ethanol to afford compound 4. Yield: 65%. M.P: 239–240 °C. 1H NMR (DMSO-d6): δ 11.4 (s, 1H, NH), 7.9 (s, 1H, NH), 7.0–7.4 (m, 5H, SC6H5), 5.6 (s, 1H, C5H of pyrimidine). Anal Cacld for C10H8N2SO2: C, 54.54; Sotrastaurin research buy H, 3.63; N, 12.72. Found: C, 54.52; H, 3.62; N, 12.70. A mixture of 6-phenylthiouracil (4) (3 g, 0.0125 mol) and POCl3 (12.2 ml, 0.125 mol) was refluxed for 4–5 h. Excess of POCl3 was removed under reduced pressure and the mixture was treated with ice/water. The separated solid was extracted with ether (3 × 50 ml) and washed with 5% aq. sodium bicarbonate

solution (1 × 25 ml). Ether layer was collected and dried over anhydrous sodium sulfate. Evaporation of the solvent furnished the title compound 5. Yield: 72%. M.P: 48–50 °C. IR (cm−1): 749 & 705 (C–Cl). 1H NMR (DMSO-d6): δ 7.2–7.6 (m, 5H, SC6H5), 5.9 (s, 1H, C5H of pyrimidine). Mass: m/z = 257 (M+, 100%). Anal Cacld for C10H6N2SCl2: C, 46.91; H, 2.43; N, 10.94. Found: C, 46.45; H, 2.36; N, 10.60. To a solution of appropriate phenol (0.004 mol) in dry toluene (10 ml) was treated with 60% w/v sodium hydride (0.004 mol) in oil under an inert atmosphere. The mixture was warmed to 50–60 °C for 30 min to facilitate the formation of sodium salt. unless After all the sodium hydride had reacted, the suspension www.selleckchem.com/products/azd9291.html was cooled and a solution of 2,4-dichloro-6-(phenylthio)pyrimidine (5) (0.001 mol) in toluene

(10 ml) was added slowly at room temperature. After stirring the reaction mixture at 75–80 °C overnight, it was allowed to cool and the mixture was treated with water (25 ml). The separated solid was extracted with ether (3 × 25 ml) and washed with 10% aq. sodium hydroxide (3 × 25 ml). Ether layer was collected, dried over anhydrous sodium sulfate and evaporation of the solvent furnished the crude compounds, which were recrystallized from spirit yielded the title compounds 6a–g in 62–86% yield. Yield: 86%. M.P: 130–132 °C. 1H NMR (DMSO-d6): δ 7.0–7.5 (m, 15H, ArH), 5.9 (s, 1H, C5H of pyrimidine). Mass: molecular ion peak at m/z = 374 (M+, 100%). Anal Cacld for C22H16O2N2S: C, 70.96; H, 4.30; N, 7.52. Found: C, 70.89; H, 4.28; N, 7.50. Yield: 70%. M.P: 79–80 °C. 1H NMR (DMSO-d6): δ 6.8–7.5 (m, 13H, ArH), 5.9 (s, 1H, C5H of pyrimidine), 2.3 (s, 6H, CH3).