Sodium Hydroxide → 4-((1R,3aS,5aR,5bR,7aR,11aS,11bR,13aR,13bR)-3a-(furan-2-ylmethylamino)-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 85644Notes

Reaction equation

HRID 85644 reaction equation
[O:1]1[CH:5]=[CH:4][CH:3]=[C:2]1[CH2:6][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.[OH-].[Na+]>O1CCOCC1>[O:1]1[CH:5]=[CH:4][CH:3]=[C:2]1[CH2:6][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

4

Reactant 2

HCID 14798Sodium HydroxideHCID 86676601methyl 4-((1R,3aS,5aR,5bR,7aR,11aS,11bR,13aR,13bR)-3a-(furan-2-ylmethylamino)-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 683581384-((1R,3aS,5aR,5bR,7aR,11aS,11bR,13aR,13bR)-3a-(furan-2-ylmethylamino)-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 60.5%

Reagents, catalysts & solvents 1

HCID 312751,4-DioxaneSolvent

Conditions

Temperature
85 °C

Procedure

To a solution of methyl 4-((1R,3aS,5aR,5bR,7aR,11aS,11bR,13aR,13bR)-3a-(furan-2-ylmethylamino)-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 (31 mg, 0.050 mmol) in 1,4-dioxane (2 mL) was added 1N NaOH (0.248 mL, 0.248 mmol). The mixture was heated to 85° C. for 22 h then was cooled to rt. The crude product was purified by prep HPLC. The fractions containing the expected product were combined and were concentrated under reduced pressure to afford the title compound (19.3 mg, 0.030 mmol, 60.5% yield) as a clear film. LCMS: m/e 610.69 (M+H)+, 2.35 min (method 2). 1H NMR (400 MHz, CHLOROFORM-d) d ppm 8.00 (d, J=7.78 Hz, 2H), 7.37 (d, J=1.00 Hz, 1H), 7.23 (d, J=7.78 Hz, 2H), 6.33 (dd, J=3.14, 1.88 Hz, 1H), 6.21 (d, J=2.76 Hz, 1H), 5.53 (br. s., 1H), 5.29-5.34 (m, 1H), 4.72 (d, J=1.76 Hz, 1H), 4.60 (s, 1H), 3.67 (s, 2H), 2.64 (td, J=10.85, 5.40 Hz, 1H), 1.71 (s, 3H), 1.10-1.15 (m, 3H), 1.01 (s, 3H), 1.00 (s, 3H), 0.97-2.18 (m, 22H), 0.96 (s, 6H).

Workup

  1. temperaturethen was cooled to rt
  2. customThe crude product was purified by prep HPLC
  3. additionThe fractions containing the expected product
  4. concentrationwere concentrated under reduced pressure

Sources & evidence

ORD record
ord-610cdb74e282475a9e5b26353f8d70fe
Source dataset
uspto-grants-2014_09
Patent number
US08846647B2

Reaction notes

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