Sodium borohydride → (6Z,9Z,27Z,30Z)-19-hydroxyhexatriaconta-6,9,27,30-tetraen-18-yl 3-(dimethylamino)propanoate

HRID 537829Notes

Reaction equation

HRID 537829 reaction equation
[CH3:1][N:2]([CH3:45])[CH2:3][CH2:4][C:5]([O:7][CH:8]([C:26](=[O:44])[CH2:27][CH2:28][CH2:29][CH2:30][CH2:31][CH2:32][CH2:33]/[CH:34]=[CH:35]\[CH2:36]/[CH:37]=[CH:38]\[CH2:39][CH2:40][CH2:41][CH2:42][CH3:43])[CH2:9][CH2:10][CH2:11][CH2:12][CH2:13][CH2:14][CH2:15]/[CH:16]=[CH:17]\[CH2:18]/[CH:19]=[CH:20]\[CH2:21][CH2:22][CH2:23][CH2:24][CH3:25])=[O:6].[BH4-].[Na+]>CO>[CH3:45][N:2]([CH3:1])[CH2:3][CH2:4][C:5]([O:7][CH:8]([CH:26]([OH:44])[CH2:27][CH2:28][CH2:29][CH2:30][CH2:31][CH2:32][CH2:33]/[CH:34]=[CH:35]\[CH2:36]/[CH:37]=[CH:38]\[CH2:39][CH2:40][CH2:41][CH2:42][CH3:43])[CH2:9][CH2:10][CH2:11][CH2:12][CH2:13][CH2:14][CH2:15]/[CH:16]=[CH:17]\[CH2:18]/[CH:19]=[CH:20]\[CH2:21][CH2:22][CH2:23][CH2:24][CH3:25])=[O:6]

Participants

4

Reactant 2

HCID 4311764Sodium borohydrideHCID 86684837(6Z,9Z,27Z,30Z)-19-oxohexatriaconta-6,9,27,30-tetraen-18-yl 3-(dimethylamino)propanoate

Product 1

HCID 57500209(6Z,9Z,27Z,30Z)-19-hydroxyhexatriaconta-6,9,27,30-tetraen-18-yl 3-(dimethylamino)propanoateYield 91.7%

Reagents, catalysts & solvents 1

HCID 887MethanolSolvent

Procedure

To a solution of (6Z,9Z,27Z,30Z)-19-oxohexatriaconta-6,9,27,30-tetraen-18-yl 3-(dimethylamino)propanoate (450 mg, 0.72 mmol) in anhydrous methanol (20 mL) was slowly added sodium borohydride (222 mg, 5.9 mmol). The solution was stirred for 16 hours at room temperature then quenched with water (20 mL). The solution was washed with dichloromethane (3×50 mL) and the combined extracts were dried on magnesium sulfate, filtered and concentrated in vacuo to dryness. The residue was purified by column chromatography (100% ethyl acetate) to afford the title compound as a colorless oil (416 mg, 91%). 1H NMR (400 MHz, CDCl3): δ 5.45-5.28 (m, 8H), 5.02-4.82 (m, 1H), 3.69-3.43 (m, 1H), 2.84-2.45 (m, 8H), 2.30 (s, 6H), 2.09-2.02 (m, 8H), 1.67-1.20 (m, 36H), 0.93-0.86 (m, 6H).

Workup

  1. customthen quenched with water (20 mL)
  2. washThe solution was washed with dichloromethane (3×50 mL)
  3. customthe combined extracts were dried on magnesium sulfate
  4. filtrationfiltered
  5. concentrationconcentrated in vacuo to dryness
  6. customThe residue was purified by column chromatography (100% ethyl acetate)

Sources & evidence

ORD record
ord-ac661eacae8143a99ac4d737b9b4fca7
Source dataset
uspto-grants-2014_10
Patent number
US08865675B2

Reaction notes

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