Potassium Carbonate → (5R*,6S*)-6-biphenyl-4-yl-3-(3,5-dichlorophenyl)-1-methyl-1,3-diazaspiro[4.4]nonane-2,4-dione

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Reaction Conditions

Reaction Steps

A solution of (5R*,6S*)-6-(4-bromophenyl)-3-(3,5-dichlorophenyl)-1-methyl-1,3-diazaspiro[4.4]nonane-2,4-dione (80 mg, 0.17 mmol) (Example 1), phenylboronic acid (73 mg, 0.6 mmol), (Ph3P)4Pd (20 mg, 0.02 mmol) and K2CO3 (80 mg, 0.6 mmol) in a mixture of DME (1.5 ml) and water (50 μl) was heated at 80° C. for 12 h. The insoluble material was filtered off and the filtrate concentrated. After chromatography, (5R*,6S*)-6-biphenyl-4-yl-3-(3,5-dichlorophenyl)-1-methyl-1,3-diazaspiro[4.4]nonane-2,4-dione (20 mg) was obtained as a white solid. 1H NMR (CDCl3): 7.5-7.6 (4H, m), 7.3-7.5 (3H, m), 7.15-7.3 (3H, m), 6.64 (2H, m), 3.45 (1H, dd, J1=12.4 Hz, J2=6.1 Hz), 3.18 (3H, s), 2.5-2.75 (1H, m), 1.8-2.45 (5H, m).

Provenance & Evidence