4-Nitrobenzenesulfonyl chloride → HCID 15539132, compound

Participants

Reaction Steps

A solution of hexahydro-5-pyrimidinol (1.0 g, 9.8 mmol) and sodium carbonate (1.04 g, 9.8 mmol) in 10 mL of water in a 250 mL round bottom flask was stirred with a magnetic stir bar for 10 minutes. A solution of 4-nitrobenzenesulfonyl chloride (4.4 g, 19.8 mmol) in 10 mL of toluene was added dropwise over a period of 30 minutes. The reaction mixture formed a white suspended solid. A mixture of 100 mL of water and 20 mL of toluene was added to the reaction mixture and stirred overnight. The reaction mixture was filtered and the solid was washed with 100 mL of toluene, then with 100 mL of water. The solid was dried at room temperature under reduced pressure to give 4.4 g (95%) of crude product, hexahydro-1,3-bis(4-nitrobenzenesulfonyl)-5-pyrimidinol. [1H NMR (DMSO-d6): δ 2.29 (s, 1 H), 2.84, 3.47 {AB q of d, J=12.4(3.8) Hz, 12.4(7.9) Hz, 4 H}, 3.30 (m, 1 H), 4.46, 5.07 (AB q, J=12.5 Hz, 2 H), 5.31 (s, 1 H), 8.11, 8.41 (AB q, J=8.7 Hz, 8 H); 13C NMR (DMSO-d6): δ 50.0, 59.8, 60.6, 124.6, 128.9, 143.3, 150.1].

Provenance & Evidence