Cesium carbonate → 1-[5-(3-Nitro-5-{[4-(trifluoromethyl)pyrimidin-2-yl]amino}phenyl)-1,3-thiazol-2-yl]cyclobutanol

Participants

Reaction Conditions

Reaction Steps

A mixture of 2-chloro-4-(trifluoromethyl)pyrimidine (2.04 mL, 16.9 mmol), Intermediate 22 (4.69 g, 16.1 mmol), cesium carbonate (10.5 g, 32.2 mmol), XantPhos (1.40 g, 2.41 mmol) and Pd(OAc)2 (0.361 g, 1.61 mmol) in dioxane (100 mL) was heated to 100° C. overnight. Upon completion the reaction was cooled to room temperature and was diluted with ethyl acetate (100 mL) and filtered through Celite. After in vacuo concentration, purification by chromatography on silica gel (70:30 to 20:80 hexanes:ethyl acetate) provided 4.23 g (9.67 mmol, 60%) of 1-[5-(3-nitro-5-{[4-(trifluoromethyl)pyrimidin-2-yl]amino}phenyl)-1,3-thiazol-2-yl]cyclobutanol as a bright yellow solid. MS APCI: [M+H]+ m/z 438.0. 1H NMR (400 MHz, Acetone): δ 9.74 (s, 1H); 8.96 (s, 1H); 8.85 (s, 1H); 8.60 (s, 1H); 8.24 (s, 1H); 8.15 (s, 1H); 7.40 (s, 1H); 5.64 (s, 1H); 2.86 (s, 2H); 2.72 (s, 2H); 2.47 (d, J=11.2 Hz, 2H). rhSYK=++.

Provenance & Evidence