4-Aminophenol → [4-(4-Amino-phenoxy)-pyridin-2-yl]pyrrolidin-1-yl-methanone

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Reaction Steps

4-Aminophenol (122 mg, 1.12 mmol) is dissolved in DMF (3 ml) and treated with potassium-tert-butylate (131 mg, 1.16 mmol) at rt. The reaction mixture is stirred for 2 h to give a brown suspension. (4-Chloro-pyridin-2-yl)-pyrrolidin-1-yl-methanone (Stage 101.1; 236 mg, 1.12 mmol) and K2CO3 (82 mg, 0.59 mmol) are added. The reaction mixture is then stirred for 12 h at 80° C. It Is allowed to cool to rt again and the solvent is removed in vacuo. The residual brown oil is taken up in ethyl acetate and washed with brine. The organic layer is dried over MgSO4, concentrated and the residual crude product is purified by flash chromatography (SiO2; gradient CH2Cl2/MeOH 99:1 to 92:8) to give the title compound as a slightly brown solid: C16H17N3O2: M+=284.2.

Provenance & Evidence