Acetic Acid → HCID 86676405, compound

HRID 405062Notes

Reaction equation

HRID 405062 reaction equation
[CH:1]([C@:3]12[CH2:41][CH2:40][C@@H:39]([C:42]([CH3:44])=[CH2:43])[C@@H:4]1[C@@H:5]1[C@@:18]([CH3:21])([CH2:19][CH2:20]2)[C@@:17]2([CH3:22])[C@@H:8]([C@:9]3([CH3:38])[C@@H:14]([CH2:15][CH2:16]2)[C:13]([CH3:24])([CH3:23])[C:12]([C:25]2[CH:37]=[CH:36][C:28]([C:29]([O:31][C:32]([CH3:35])([CH3:34])[CH3:33])=[O:30])=[CH:27][CH:26]=2)=[CH:11][CH2:10]3)[CH2:7][CH2:6]1)=O.C(O)(=O)C.[C:49]([NH:52][CH2:53][CH2:54][NH2:55])(=[O:51])[CH3:50].C(O[BH-](OC(=O)C)OC(=O)C)(=O)C.[Na+]>ClCCCl.C([O-])(O)=O.[Na+]>[C:49]([NH:52][CH2:53][CH2:54][NH:55][CH2:1][C@:3]12[CH2:41][CH2:40][C@@H:39]([C:42]([CH3:44])=[CH2:43])[C@@H:4]1[C@@H:5]1[C@@:18]([CH3:21])([CH2:19][CH2:20]2)[C@@:17]2([CH3:22])[C@@H:8]([C@:9]3([CH3:38])[C@@H:14]([CH2:15][CH2:16]2)[C:13]([CH3:23])([CH3:24])[C:12]([C:25]2[CH:26]=[CH:27][C:28]([C:29]([O:31][C:32]([CH3:33])([CH3:34])[CH3:35])=[O:30])=[CH:36][CH:37]=2)=[CH:11][CH2:10]3)[CH2:7][CH2:6]1)(=[O:51])[CH3:50]

Participants

7

Reactant 4

HCID 176Acetic AcidHCID 66082N-(2-aminoethyl)acetamideHCID 5049666Sodium triacetoxyborohydrideHCID 86676397tert-butyl 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

Product 1

HCID 86676405HCID 86676405, compound

Reagents, catalysts & solvents 2

HCID 111,2-DichloroethaneSolventHCID 516892Sodium BicarbonateSolvent

Procedure

To a solution of tert-butyl 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 (0.1 g, 0.167 mmol) in DCE (2 ml) was added acetic acid (0.019 ml, 0.334 mmol) and N-acetylethylenediamine (0.048 ml, 0.501 mmol). The mixture was stirred for 2 h at rt then to the mixture was added sodium triacetoxyborohydride (0.177 g, 0.835 mmol). The mixture was stirred at rt for 3 days then was diluted with 7 ml of sat. NaHCO3 and was extracted with dichloromethane (3×7 ml). The combined organic layers were dried with Na2SO4, the drying agent was removed by filtration, and the filtrate was concentrated under reduced pressure. The crude material was used in the next step with no additional purification. LCMS: m/e 685.4 (M+H)+, 3.86 min (method 6).

Workup

  1. stirringThe mixture was stirred at rt for 3 days
  2. extractionwas extracted with dichloromethane (3×7 ml)
  3. dry with materialThe combined organic layers were dried with Na2SO4
  4. customthe drying agent was removed by filtration
  5. concentrationthe filtrate was concentrated under reduced pressure
  6. customThe crude material was used in the next step with no additional purification
  7. customm/e 685.4 (M+H)+, 3.86 min (method 6)

Sources & evidence

ORD record
ord-55dfa92007d94e24bef6aa4b1c7a1d6a
Source dataset
uspto-grants-2014_06
Patent number
US08748415B2

Reaction notes

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