Cholesterol → 25279-63-4

HRID 511732Notes

Reaction equation

HRID 511732 reaction equation
[CH3:1][CH:2]([CH2:4][CH2:5][CH2:6][C@H:7]([C@@H:9]1[C@:27]2([CH3:28])[C@H:12]([C@H:13]3[C@H:24]([CH2:25][CH2:26]2)[C@:22]2([CH3:23])[C:16]([CH2:17][C@H:18]([CH2:20][CH2:21]2)[OH:19])=[CH:15][CH2:14]3)[CH2:11][CH2:10]1)[CH3:8])[CH3:3].C(N(CC)CC)C.[N+:36]([C:39]1[CH:40]=[C:41]([CH:45]=[C:46]([N+:48]([O-:50])=[O:49])[CH:47]=1)[C:42](Cl)=[O:43])([O-:38])=[O:37]>CN(C)C1C=CN=CC=1.ClCCl>[N+:36]([C:39]1[CH:40]=[C:41]([CH:45]=[C:46]([N+:48]([O-:50])=[O:49])[CH:47]=1)[C:42]([O:19][C@H:18]1[CH2:20][CH2:21][C@@:22]2([CH3:23])[C:16](=[CH:15][CH2:14][C@@H:13]3[C@@H:24]2[CH2:25][CH2:26][C@@:27]2([CH3:28])[C@H:12]3[CH2:11][CH2:10][C@@H:9]2[C@H:7]([CH3:8])[CH2:6][CH2:5][CH2:4][CH:2]([CH3:1])[CH3:3])[CH2:17]1)=[O:43])([O-:38])=[O:37]

Participants

6

Reactant 3

HCID 5997CholesterolHCID 74323,5-Dinitrobenzoyl chlorideHCID 8471Triethylamine

Product 1

HCID 2111671025279-63-4Yield 56.4%

Reagents, catalysts & solvents 2

HCID 142844-(Dimethylamino)pyridineCatalystHCID 6344DichloromethaneSolvent2×

Conditions

Temperature
0 °C

Procedure

20.00 g (51.7 mmol) of cholesterol, 2.88 g (25.75 mmol) of 4-dimethylaminopyridine, 6.27 g (62.04 mmol) of triethylamine are dissolved in 100 mL of dichloromethane. 11.92 g (51.7 mmol) of commercial 3,5-dinitrobenzoylchloride dissolved in 50 mL of dichloromethane are added at 0° C. The solution is stirred for 2 h at 0° C. and allowed to stir at room temperature overnight. After 22 hours at room temperature, the reaction mixture is partitioned between dichloromethane and water. The organic phase is washed repeatedly with water, dried over sodium sulfate, filtrated and concentrated under reduced pressure. Crystallization from ethyl acetate:hexane mixture yielded 16.94 g (56%) of (3-β)-cholest-5-en-3-yl 3,5-dinitrobenzoate as yellowish crystals.

Workup

  1. additionare added at 0° C
  2. stirringto stir at room temperature overnight
  3. waitAfter 22 hours at room temperature
  4. customthe reaction mixture is partitioned between dichloromethane and water
  5. washThe organic phase is washed repeatedly with water
  6. dry with materialdried over sodium sulfate
  7. filtrationfiltrated
  8. concentrationconcentrated under reduced pressure
  9. customCrystallization from ethyl acetate

Sources & evidence

ORD record
ord-aebcc1a4cc8b4ab3a53d9eb5b82a5040
Source dataset
uspto-grants-2015_08
Patent number
US09097938B2

Reaction notes

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