Sodium Hydroxide → 2-(2,6-Dichloro-4-(trifluoromethyl)phenyl)-4-methyl-1,2,6-thiadiazinan 1,1-dioxide

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Reaction Steps

To methyl 6-(2,6-dichloro-4-(trifluoromethyl)phenyl)-4-methyl-1,2,6-thia-diazinan-2-carboxylate 1,1-dioxide (3.58 g, 8.50 mmol) in MeOH (60 mL), was dropwisely added 1 N NaOH (85 mL, 85 mmol) and agitated for 12 hr at room temperature. Following concentration under reduced pressure, ethyl acetate (30 mL) and water (30 mL) were added to the resultant to obtain the organic layer. The organic layer was dried over MgSO4 and crystallized using ethyl acetate (10 mL) and hexane (70 mL), giving the compound of interest (2.96 g, 96%, white solid). 1H NMR (300 MHz, CDCl3): δ 7.65 (s, 2H), 4.48-4.43 (m, 1H), 4.04-3.96 (m, 1H), 3.61-3.55 (m, 2H), 3.42-3.36 (m, 1H), 2.32 (m, 1H), 0.97 (d, 3H, J=6.8 Hz).

Provenance & Evidence