Trifluoroacetic acid → 4-((1R,3aS,5aR,5bR,7aR,11aS,11bR,13aR,13bR)-5a,5b,8,8,11a-pentamethyl-3a-(piperidin-3-ylmethylamino)-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 85642Notes

Reaction equation

HRID 85642 reaction equation
C(OC([N:8]1[CH2:13][CH2:12][CH2:11][CH:10]([CH2:14][NH:15][C@:16]23[CH2:50][CH2:49][C@@H:48]([C:51]([CH3:53])=[CH2:52])[C@@H:17]2[C@@H:18]2[C@@:31]([CH3:34])([CH2:32][CH2:33]3)[C@@:30]3([CH3:35])[C@@H:21]([C@:22]4([CH3:47])[C@@H:27]([CH2:28][CH2:29]3)[C:26]([CH3:37])([CH3:36])[C:25]([C:38]3[CH:46]=[CH:45][C:41]([C:42]([OH:44])=[O:43])=[CH:40][CH:39]=3)=[CH:24][CH2:23]4)[CH2:20][CH2:19]2)[CH2:9]1)=O)(C)(C)C.C(O)(C(F)(F)F)=O>C(Cl)Cl>[CH3:34][C@:31]12[C@@:30]3([CH3:35])[C@@H:21]([C@:22]4([CH3:47])[C@@H:27]([CH2:28][CH2:29]3)[C:26]([CH3:36])([CH3:37])[C:25]([C:38]3[CH:46]=[CH:45][C:41]([C:42]([OH:44])=[O:43])=[CH:40][CH:39]=3)=[CH:24][CH2:23]4)[CH2:20][CH2:19][C@@H:18]1[C@H:17]1[C@H:48]([C:51]([CH3:53])=[CH2:52])[CH2:49][CH2:50][C@:16]1([NH:15][CH2:14][CH:10]1[CH2:11][CH2:12][CH2:13][NH:8][CH2:9]1)[CH2:33][CH2:32]2

Participants

4

Reactant 2

HCID 6422Trifluoroacetic acidHCID 683581024-((1R,3aS,5aR,5bR,7aR,11aS,11bR,13aR,13bR)-3a-((1-(tert-butoxycarbonyl)piperidin-3-yl)methylamino)-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

Product 1

HCID 683580824-((1R,3aS,5aR,5bR,7aR,11aS,11bR,13aR,13bR)-5a,5b,8,8,11a-pentamethyl-3a-(piperidin-3-ylmethylamino)-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 81%

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent

Procedure

To a solution of 4-((1R,3aS,5aR,5bR,7aR,11aS,11bR,13aR,13bR)-3a-((1-(tert-butoxycarbonyl)piperidin-3-yl)methylamino)-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 (0.019 g, 0.026 mmol) in DCM (1 mL) was added TFA (0.25 mL, 3.24 mmol). The mixture was stirred at rt for 1.75 h. Then, the mixture was concentrated under reduced pressure and purified by prep HPLC to give the title compound (14.2 mg, 0.021 mmol, 81% yield) as a white solid. LCMS: m/e 627.6 (M+H)+, 1.50 min (method 2). 1H NMR (500 MHz, Acetic acid d4) δ ppm 8.04 (2H, d, J=8.2 Hz), 7.30 (2H, d, J=7.9 Hz), 5.37 (1H, s), 4.85 (1H, d, J=5.5 Hz), 4.75 (1H, s), 2.98-3.83 (6H, m), 2.82-2.91 (1H, m), 2.57-2.72 (1H, m), 0.85-2.33 (44H, m).

Workup

  1. concentrationThen, the mixture was concentrated under reduced pressure
  2. custompurified by prep HPLC

Sources & evidence

ORD record
ord-9854c6d785904b629e8bd8ee7d188d8a
Source dataset
uspto-grants-2014_09
Patent number
US08846647B2

Reaction notes

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