Sodium Sulfite → HCID 11278999, compound

Participants

Reaction Steps

To a solution of enantiomer A of 4-(4-hydroxy-phenyl)-1,3a,4,9b-tetrahydro-3H-5-oxa-2-thia-cyclopenta[a]naphthalen-8-ol 11d (10 mg, 0.033 mmol) in MeOH/H2O (1:1, 3 mL) add oxone (40 mg, 0.066 mmol). Stir the reaction at 50° C. for 2 hours. Add 1.0 M Na2SO3 and stir the reaction for 5 minutes. Dilute with EtOAc and wash with saturated sodium bicarbonate. Extract aqueous layer with EtOAc (2×). Combine organic extracts, dry (Na2SO4), filter and concentrate to afford 4-(4-Hydroxy-phenyl)-2,2-dioxo-1,2,3,3a,4,9b-hexahydro-5-oxa-2λ6-thia-cyclopenta[a]naphthalen-8-ol 14 (8.5 mg, 0.025 mmol, 77%). 1H NMR (δ, 400 MHz, MeOD) 7.47 (d, 2H, J=8.3 Hz), 6.87-6.74 (m, 4H), 6.67 (dd, 1H, J=8.6, 2.4 Hz), 5.25 (s, 1H), 4.12-4.01 (m, 2H), 3.00 (m, 1H), 2.72 (dt, 1H, J=6.8, 12.8 Hz), 2.63-2.53 (m, 1H), 2.52-2.42 (m, 1H). HPLC (Zorbax C18 column; 10 to 100% CH3CN/H2O for 10 min then 100% CH3CN for 5 min; 1 mL/min; tr 7.68 min).

Provenance & Evidence