Water → 3alpha-Aminocholest-5-ene

HRID 64252

Reaction equation

[N:1]([C@@H:4]1[CH2:28][CH2:27][C@@:26]2([CH3:29])[C:6](=[CH:7][CH2:8][C@@H:9]3[C@@H:25]2[CH2:24][CH2:23][C@@:22]2([CH3:30])[C@H:10]3[CH2:11][CH2:12][C@@H:13]2[C@H:14]([CH3:21])[CH2:15][CH2:16][CH2:17][CH:18]([CH3:20])[CH3:19])[CH2:5]1)=[N+]=[N-].[H-].[Al+3].[Li+].[H-].[H-].[H-].O.[OH-].[Na+]>C(OCC)C>[NH2:1][C@@H:4]1[CH2:28][CH2:27][C@@:26]2([CH3:29])[C:6](=[CH:7][CH2:8][C@@H:9]3[C@@H:25]2[CH2:24][CH2:23][C@@:22]2([CH3:30])[C@H:10]3[CH2:11][CH2:12][C@@H:13]2[C@H:14]([CH3:21])[CH2:15][CH2:16][CH2:17][CH:18]([CH3:20])[CH3:19])[CH2:5]1

Participants

Conditions

Temperature: 0 °C

Procedure

3α-Azidocholest-5-ene (4.62 mmol, 1.9 g) was dissolved in 154 mL of anhydrous diethyl ether. Lithium aluminum hydride (46.2 mmol, 1.75 g) was then added in one portion. After 30 hours, the reaction mixture was cooled to 0° C. 1.75 mL of deionized water was then added dropwise. After stirring for five minutes, 1.75 mL of 15% aqueous NaOH was added dropwise. After stirring for another five minutes, 5.25 mL of deionized water was added dropwise. The reaction was then stirred until all the salts turned white. Immediately afterwards, the reaction was filtered, dried (Na2SO4), and concentrated to afford 3α-Aminocholest-5-ene (1.57 g, 93%) as a white solid. mp 104-106° C.; IR (thin film) 3367, 3343, 2931, 1557 cm−1; 1H NMR (300 MHz, CDCl3) d 5.37-5.34 (m, 1H), 3.15 (t, 1H, J=3.2 Hz), 2.61-2.54 (m, 1H), 2.04-1.74 (m, 6H), 1.63-1.03 (m, 21H), 1.00 (s, 3H), 0.91 (d, 3H, J=6.5 Hz), 0.86 (d, 6H, J=6.6 Hz), 0.67 (s, 3H).

Workup

stirringAfter stirring for another five minutes
stirringThe reaction was then stirred until all the salts
filtrationImmediately afterwards, the reaction was filtered
dry with materialdried (Na2SO4)
concentrationconcentrated

Sources & evidence

ORD record: ord-a6342ea9989042ea9f7a10c29324fad0
Source dataset: uspto-grants-2016_09
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US09447139B2

Linked notes

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