Cesium carbonate → HCID 89405878, compound

Participants

Reaction Steps

(Ref: Angew. Chem. Int. Ed., 48:914-917 (2009)). To a stirred suspension of 3-chloro-2-fluorobenzaldehyde (1.308 g, 8.25 mmol) and Cs2CO3 (4.03 g, 12.38 mmol) in DCM (10 mL) was added a solution of (R)-2-methylpropane-2-sulfinamide (1 g, 8.25 mmol) in DCM (50 mL) dropwise for 10 min. The solution was then stirred for 2 h at rt. LC/MS indicated that the reaction was complete. The reaction mixture was then diluted with EtOAc (50 mL) and washed with brine (20 mL×3). The organic layers were dried over Na2SO4 and concentrated in vacuo to give (R,E)-N-(3-chloro-2-fluorobenzylidene)-2-methylpropane-2-sulfinamide (2.3 g, 107%) as a clear oil. MS (ESI) m/z: 262.1 (M+H)+.

Provenance & Evidence