1-(3-Aminopropyl)-2-pyrrolidinone → 4-[(1R,3aS,5aR,5bR,7aR,11aS,11bR,13aR,13bR)-1-isopropenyl-5a,5b,8,8,11a-pentamethyl-3a-[[3-(2-oxopyrrolidin-1-yl)propylamino]methyl]-1,2,3,4,5,6,7,7a,11,11b,12,13,13a,13b-tetradecahydrocyclopenta[a]chrysen-9-yl]-2-fluoro-benzoic acid

Participants

Reaction Steps

The title compound was prepared in 82% yield following steps 5 and 6 described above, using methyl 2-fluoro-4-((1R,3aS,5aR,5bR,7aR,11aS,11bR,13aR,13bR)-3a-formyl-5a,5b,8,8,11a-pentamethyl-1-(prop-1-en-2-yl)-2,3,3a,4,5,5a,5b,6,7,7a,8,11,11a,11b,12,13,13a,13b-octadecahydro-1H-cyclopenta[a]chrysen-9-yl)benzoate and 1-(3-aminopropyl)pyrrolidin-2-one as the reactant amine MS: m/e 687.5 (MH+), 1.71 min (method 2). 1H NMR (400 MHz, MeOD) δ ppm 0.96 (s, 3H) 0.98 (s, 3H) 1.02 (s, 3H) 1.08 (s, 3H) 1.17 (s, 3H) 1.73 (s, 3H) 0.90-1.91 (m, 20H) 1.96-2.20 (m, 6H) 2.44 (t, J=8.03 Hz, 2H) 2.47-2.55 (m, 1H) 2.83 (d, J=13.05 Hz, 1H) 3.06 (t, J=7.03 Hz, 2H) 3.20 (d, J=13.55 Hz, 1H) 3.43 (t, J=6.53 Hz, 2H) 3.51 (t, J=7.15 Hz, 2H) 4.62-4.66 (m, 1H) 4.75 (d, J=1.76 Hz, 1H) 5.35 (dd, J=6.15, 1.88 Hz, 1H) 6.94 (dd, J=11.80, 1.25 Hz, 1H) 7.02 (dd, J=8.03, 1.51 Hz, 1H) 7.83 (t, J=7.91 Hz, 1H). 19F NMR (376 MHz, MeOD) δ ppm −112.76 (s, 1 F).

Provenance & Evidence