Hydrogen Sulfide → ethyl ((1S)-5-{3-[4-(aminocarbonothioyl)-2-methoxyphenoxy]propoxy)-2,3-dihydro-1H-inden-1-yl)acetate

Participants

Reaction Conditions

Reaction Steps

Into a solution of ethyl {(1S)-5-[3-(4-cyano-2-methoxyphenoxy)propoxy]-2,3-dihydro-1H-inden-1-yl}acetate (2.2 g, 5.4 mmol) (Example 145) in DMF (anhydrous, 20 mL) under argon at rt was passed H2S gas at a moderate rate for 30 min. A solution of diethylamine (0.8 g, 8.1 mmol) in DMF (5 mL) was added in one portion, and the reaction was stirred at 60° C. for 3 h. Then the reaction was cooled to rt and argon was passed through the reaction mixture for 1 h to remove residual H2S. The reaction mixture was then concentrated under reduced pressure and the residue purified by silica gel flash chromatography (EtOAc/Hexane (v/v)=1:1) to afford 1.9 g (81%) of the title compound as a yellow solid. 1H NMR (400 MHz, DMSO-d6): δ 1.21 (t, 3H), 1.60-1.68 (m, 1H), 2.15-2.22 (m, 2H), 2.23-2.34 (m, 1H), 2.38 (q, 1H), 2.70-2.86 (m, 3H), 3.38-3.44 (m, 1H), 3.80 (s, 3H), 4.05-4.16 (m, 4H), 4.19 (t, 2H), 6.70 (d, 1H), 6.80 (s, 1H), 6.97 (d, 1H), 7.06 (d, 1H), 7.56-7.64 (m, 2H), 9.33-9.40 (s, 1H), 9.65 (s, 1H).

Provenance & Evidence