Cesium carbonate → HCID 86667301, compound

Participants

Reaction Conditions

Reaction Steps

To a round bottom was added 5-bromo-pyrimidine-2-carboxylic acid methyl ester (14.50 g, 66.81 mmol), (+/−)-BINAP (4.16 g, 6.68 mmol), Pd(OAc)2 (750 mg, 3.34 mmol), and Cs2CO3 (26.1 g, 80.2 mmol). Toluene (100 mL) and benzophenone imine (12.3 mL, 73.5 mmol) were added and the mixture heated to 105° C. as an orange mixture. At 17 h, the reaction was cooled and partitioned between ethyl acetate and 1N NaOH. The aqueous layer was extracted with ethyl acetate and the combined organics dried over MgSO4. Purification by silica gel flash chromatography (ethyl acetate/heptane) gave 5-(benzhydrylidene-amino)-pyrimidine-2-carboxylic acid methyl ester (9.83 g, 46%) as a bright yellow solid. 1H NMR (400 MHz, DMSO-d6, δ): 8.42 (s, 2 H) 7.74 (d, J=6.8 Hz, 2 H) 7.61 (m, 1 H) 7.54 (m, 2 H) 7.38 (br. s., 3 H) 7.26 (br. s., 2 H) 3.83 (s, 3 H); MS (M+1): 318.2.

Provenance & Evidence