1-Ethyl-3-(3'-dimethylaminopropyl)carbodiimide → 1-((3-(4-Bromophenyl)-1,2,4-oxadiazol-5-yl)methyl)-3,3-bis(4-fluorophenyl)pyrrolidin-2-one

Participants

Reaction Conditions

Reaction Steps

2-(3,3-bis(4-fluorophenyl)-2-oxopyrrolidin-1-yl)acetic acid (0.300 g, 0.905 mmol; Example 58D), (Z)-4-bromo-N-hydroxybenzimidamide (0.214 g, 0.996 mmol) and N1-((ethylimino)methylene)-N3,N3-dimethylpropane-1,3-diamine (0.211 g, 1.358 mmol) were stirred together in dichloroethane (5 mL) at room temperature for 3 hours. The reaction was then heated to 85° C. for 18 hours. The reaction was cooled, loaded onto a GraceResolv 80 g silica gel column (Grace Davison Discovery Sciences) and the product eluted with a gradient of 5% ethyl acetate/hexanes to 40% ethyl acetate/hexanes (Flow=40 mL/minute) over 40 minutes to give the title compound. 1H NMR (300 MHz, CDCl3) δ 7.85 (d, J=8.6, 2H), 7.62 (d, J=8.6, 2H), 7.38-7.30 (m, 4H), 7.07-6.97 (m, 4H), 4.87 (s, 2H), 3.56 (t, J=6.5, 2H), 2.83 (t, J=6.4, 2H); MS (ESI+) m/z 512.0 (M+H)+.

Provenance & Evidence