Hydrogen Sulfide → ethyl [(1S)-5-(3-{[5-(aminocarbonothioyl)-2-pyridinyl]oxy}propoxy)-2,3-dihydro-1H-inden-1-yl]acetate

Participants

Reaction Steps

Through a solution of ethyl ((1S)-5-{3-[(5-cyano-2-pyridinyl)oxy]propoxy}2,3-dihydro-1H-inden-1-yl)acetate (Example 258) (600 mg, 1.58 mmol) in DMF (8 mL) was passed H2S, gently at rt for 20 min. Diethylamine (0.24 mL, 2.37 mmol) was added in one portion and the resultant light-green solution was heated at 60° C. for 3 h (TLC in 2:1 hexanes/EtOAc indicated that the reaction was complete). The darkgreen solution was purged with a strong flow of argon, and then concentrated under reduced pressure. The product (0.56 g, 86%) was isolated by column chromatography (1:1 hexanes/EtOAc) as a bright yellow solid. 1H NMR (400 MHz, CD2Cl2) δ 8.65 (dd, 1H), 8.16 (dd, 1H), 7.56 (b, 1H), 7.19 (b, 1H), 7.04 (d, 1H), 6.80-6.72 (m, 2H), 6.69 (dd, 1H), 4.56 (t, 2H), 4.16 (q, 2H), 4.12 (t, 2H), 3.50 (qt, 1H), 2.90-2.78 (m, 2H), 2.70 (dd, 1H), 2.45-2.32 (m, 2H), 2.30-2.22 (m, 2H), 1.80-1.70 (m, 1H), 1.28 (t, 3H).

Provenance & Evidence