Hydrochloric Acid → 4-((1R,3aS,5aR,5bR,7aR,11aS,11bR,13aR,13bR)-3a-(3-(2-(dimethylamino)ethyl)ureido)-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)benzoic acid

HRID 85555Notes

Reaction equation

HRID 85555 reaction equation
[CH3:1][N:2]([CH3:48])[CH2:3][CH2:4][NH:5][C:6](=[O:47])[NH:7][C@:8]12[CH2:43][CH2:42][C@@H:41]([C:44]([CH3:46])=[CH2:45])[C@@H:9]1[C@@H:10]1[C@@:23]([CH3:26])([CH2:24][CH2:25]2)[C@@:22]2([CH3:27])[C@@H:13]([C@:14]3([CH3:40])[C@@H:19]([CH2:20][CH2:21]2)[C:18]([CH3:29])([CH3:28])[C:17]([C:30]2[CH:39]=[CH:38][C:33]([C:34]([O:36]C)=[O:35])=[CH:32][CH:31]=2)=[CH:16][CH2:15]3)[CH2:12][CH2:11]1.O.[OH-].[Li+].Cl.CO>C1COCC1.O>[CH3:48][N:2]([CH3:1])[CH2:3][CH2:4][NH:5][C:6](=[O:47])[NH:7][C@:8]12[CH2:43][CH2:42][C@@H:41]([C:44]([CH3:46])=[CH2:45])[C@@H:9]1[C@@H:10]1[C@@:23]([CH3:26])([CH2:24][CH2:25]2)[C@@:22]2([CH3:27])[C@@H:13]([C@:14]3([CH3:40])[C@@H:19]([CH2:20][CH2:21]2)[C:18]([CH3:29])([CH3:28])[C:17]([C:30]2[CH:39]=[CH:38][C:33]([C:34]([OH:36])=[O:35])=[CH:32][CH:31]=2)=[CH:16][CH2:15]3)[CH2:12][CH2:11]1

Participants

7

Reactant 4

HCID 313Hydrochloric AcidHCID 887MethanolHCID 168937Lithium hydroxide, monohydrateHCID 68358037methyl 4-((1R,3aS,5aR,5bR,7aR,11aS,11bR,13aR,13bR)-3a-(3-(2-(dimethylamino)ethyl)ureido)-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

Product 1

HCID 683578464-((1R,3aS,5aR,5bR,7aR,11aS,11bR,13aR,13bR)-3a-(3-(2-(dimethylamino)ethyl)ureido)-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)benzoic acidYield 95%

Reagents, catalysts & solvents 2

HCID 962WaterSolventHCID 8028TetrahydrofuranSolvent

Conditions

Temperature
75 °C

Procedure

To a cloudy solution of methyl 4-((1R,3aS,5aR,5bR,7aR,11aS,11bR,13aR,13bR)-3a-(3-(2-(dimethylamino)ethyl)ureido)-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 (0.255 g, 0.388 mmol) in THF (5 mL) was added a solution of lithium hydroxide monohydrate (0.049 g, 1.16 mmol) in water (1.00 mL). The reaction mixture was heated to 75° C. for 18 h. Then, the reaction was treated with 1N HCl (1 mL) and concentrated in vacuo, absorbed onto silica gel (3.5 g), loaded onto a silica gel column (12 g cartridge) and eluted with 90:10 DCM:MeOH to give the title compound (237 mg, 0.368 mmol, 95% yield) as a white solid. LCMS: m/e 644.4 (M+H)+, 3.95 min (method 8). 1H NMR (500 MHz, MeOD) δ ppm 7.9 (2H, d, J=8.2 Hz), 7.2 (2H, d, J=8.2 Hz), 5.9 (1H, s), 5.3-5.3 (1H, m), 4.8 (1H, d, J=1.8 Hz), 4.6 (1H, s), 3.7-3.8 (1H, m), 3.4-3.6 (2H, m), 3.4 (1H, s), 3.2-3.3 (2H, m), 2.9 (6H, s), 2.7 (1H, td, J=11.1, 5.0 Hz), 2.6 (1H, dd, J=10.2, 3.2 Hz), 2.4 (1H, dd, J=12.1, 8.1 Hz), 2.2 (1H, dd, J=17.4, 6.4 Hz), 1.9-2.0 (2H, m), 1.8 (1H, d, J=13.4 Hz), 1.7 (3H, s), 1.7 (1H, br. s.), 1.7-1.7 (1H, m), 1.6-1.6 (2H, m), 1.5-1.6 (4H, m), 1.4-1.4 (5H, m), 1.3-1.4 (3H, m), 1.2 (3H, s), 1.1-1.1 (1H, m), 1.0-1.1 (6H, m), 1.0 (3H, s), 1.0 (3H, s). 13C NMR (MeOD) δ ppm 14.5, 16.3, 16.8, 19.2, 20.6, 21.3, 22.2, 26.3, 28.2, 29.7, 30.4, 30.5, 34.5, 36.2, 36.4, 37.1, 38.2, 38.4, 41.5, 42.6, 42.8, 43.6, 48.1, 49.0, 49.3, 49.3, 50.4, 50.6, 54.0, 55.6, 59.9, 64.9, 110.3, 111.1, 124.8, 129.3, 130.7, 147.5, 150.9, 160.4.

Workup

  1. concentrationconcentrated in vacuo
  2. customabsorbed onto silica gel (3.5 g)
  3. washeluted with 90:10 DCM

Sources & evidence

ORD record
ord-3e1060eff2d8405e96f1017401fb103a
Source dataset
uspto-grants-2014_09
Patent number
US08846647B2

Reaction notes

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