Potassium Iodide → methyl 4-((1R,3aS,5aR,5bR,7aR,11aS,11bR,13aR,13bR)-3a-((2-hydroxyethyl)amino)-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

HRID 338649Notes

Reaction equation

HRID 338649 reaction equation
[NH2:1][C@:2]12[CH2:37][CH2:36][C@@H:35]([C:38]([CH3:40])=[CH2:39])[C@@H:3]1[C@@H:4]1[C@@:17]([CH3:20])([CH2:18][CH2:19]2)[C@@:16]2([CH3:21])[C@@H:7]([C@:8]3([CH3:34])[C@@H:13]([CH2:14][CH2:15]2)[C:12]([CH3:23])([CH3:22])[C:11]([C:24]2[CH:33]=[CH:32][C:27]([C:28]([O:30][CH3:31])=[O:29])=[CH:26][CH:25]=2)=[CH:10][CH2:9]3)[CH2:6][CH2:5]1.Br[CH2:42][CH2:43][OH:44].P([O-])([O-])([O-])=O.[K+].[K+].[K+].[I-].[K+]>C(#N)C>[OH:44][CH2:43][CH2:42][NH:1][C@:2]12[CH2:37][CH2:36][C@@H:35]([C:38]([CH3:40])=[CH2:39])[C@@H:3]1[C@@H:4]1[C@@:17]([CH3:20])([CH2:18][CH2:19]2)[C@@:16]2([CH3:21])[C@@H:7]([C@:8]3([CH3:34])[C@@H:13]([CH2:14][CH2:15]2)[C:12]([CH3:22])([CH3:23])[C:11]([C:24]2[CH:25]=[CH:26][C:27]([C:28]([O:30][CH3:31])=[O:29])=[CH:32][CH:33]=2)=[CH:10][CH2:9]3)[CH2:6][CH2:5]1

Participants

6

Reactant 4

HCID 4875Potassium IodideHCID 108982-BromoethanolHCID 62657Potassium Phosphate, TribasicHCID 68357865methyl 4-((1R,3aS,5aR,5bR,7aR,11aS,11bR,13aR,13bR)-3a-amino-1-isopropenyl-5a,5b,8,8,11a-pentamethyl-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 86676600methyl 4-((1R,3aS,5aR,5bR,7aR,11aS,11bR,13aR,13bR)-3a-((2-hydroxyethyl)amino)-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)benzoateYield 86.3%

Reagents, catalysts & solvents 1

HCID 6342AcetonitrileSolvent

Conditions

Temperature
120 °C

Procedure

A mixture of methyl 4-((1R,3aS,5aR,5bR,7aR,11aS,11bR,13aR,13bR)-3a-amino-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 (1500 mg, 2.76 mmol), 2-bromoethanol (1034 mg, 8.27 mmol), potassium phosphate (1756 mg, 8.27 mmol) and potassium iodide (916 mg, 5.52 mmol) in acetonitrile (10 mL) was heated to 120° C. for 15 h. The reaction mixture was poured into distilled water (40 mL). The white precipitate was filtered and washed with distilled water (100 mL). The white solid was dried under reduced pressure to provide the title compound (1.4 g, 86%), which was taken to the next step without further purification. LCMS: m/e 588.5 (M+H)+, 2.40 min (method 5).

Workup

  1. additionThe reaction mixture was poured
  2. distillationinto distilled water (40 mL)
  3. filtrationThe white precipitate was filtered
  4. washwashed with distilled water (100 mL)
  5. customThe white solid was dried under reduced pressure

Sources & evidence

ORD record
ord-110d86f8fcf84cae85e1877d29484269
Source dataset
uspto-grants-2014_11
Patent number
US08889854B2

Reaction notes

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