[Cl:1][C:2]1[C:7]([C:8](OCC)=[O:9])=[CH:6][N:5]=[C:4]([S:13][CH3:14])[N:3]=1.[H-].C([Al+]CC(C)C)C(C)C.C1(C)C=CC=CC=1.C(OCC)C>ClCCl.C(OCC)(=O)C>[Cl:1][C:2]1[C:7]([CH2:8][OH:9])=[CH:6][N:5]=[C:4]([S:13][CH3:14])[N:3]=1To ethyl 4-chloro-2-(methylthio)pyrimidine-5-carboxylate (20.0 g, 86 mmol) in dichloromethane (400 mL) at −78° C. was added diisobutylaluminum hydride, 1.0 M in toluene (172 mL, 172 mmol). The reaction was allowed to warm to 0° C. over 2 h. To the reaction was added a 20% Rochelle's (1600 mL) and diethyl ether (750 mL). The emulsion was stirred for 30 min. The organics were sequestered and the aqueous was extracted further with diethyl ether (2×500 mL). The combined organics were washed with water (500 mL), brine (500 mL), dried over MgSO4, and concentrated in vacuo and filtered through a plug of silica eluting with 1:1; ethyl acetate:CH2Cl2 to obtain compound 223 (9.6 g, 59% yield). 1H NMR (500 MHz, CDCl3) δ 8.55 (s, 1 H) 4.75 (d, J=5.87 Hz, 2 H) 2.58 (s, 3 H) 2.06-2.25 (m, J=5.14 Hz, 1H) ppm.
불러오는 중…
