Acetic Acid → HCID 86676971, compound

HRID 881585Notes

Reaction equation

HRID 881585 reaction equation
[Si]([O:8][CH2:9][CH:10]([CH2:35][O:36][CH2:37][CH2:38][CH2:39][CH2:40][CH2:41][CH2:42][CH2:43][CH2:44][CH2:45][CH2:46][CH2:47][CH2:48][CH2:49][CH2:50][CH2:51][CH3:52])[O:11][C:12](=[O:34])[CH:13]=[CH:14][CH:15]=[CH:16][CH:17]=[CH:18][CH:19]=[CH:20][CH:21]=[CH:22][CH:23]=[CH:24][CH2:25][CH2:26][CH2:27][CH2:28][CH2:29][CH2:30][CH2:31][CH2:32][CH3:33])(C(C)(C)C)(C)C.C(O)(=O)C.CCCC[N+](CCCC)(CCCC)CCCC.[F-].O>C1COCC1>[C:12]([O:11][CH:10]([CH2:9][OH:8])[CH2:35][O:36][CH2:37][CH2:38][CH2:39][CH2:40][CH2:41][CH2:42][CH2:43][CH2:44][CH2:45][CH2:46][CH2:47][CH2:48][CH2:49][CH2:50][CH2:51][CH3:52])(=[O:34])/[CH:13]=[CH:14]\[CH:15]=[CH:16][CH:17]=[CH:18][CH:19]=[CH:20][CH:21]=[CH:22][CH:23]=[CH:24][CH2:25][CH2:26][CH2:27][CH2:28][CH2:29][CH2:30][CH2:31][CH2:32][CH3:33]

Participants

6

Reactant 4

HCID 176Acetic AcidHCID 962WaterHCID 2724141Tetrabutylammonium FluorideHCID 86676970HCID 86676970, compound

Product 1

HCID 86676971HCID 86676971, compoundYield 48%

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent

Procedure

To a mixture of 4a (348.4 mg, 0.4704 mmol) and glacial acetic acid (120 μL) was added 1.0 M TBAF in 2 mL THF over a period of 15 min at 5-10° C. (ice-water bath) with constant stirring. The reaction mixture was stirred at RT for 48 hours. It was then poured into water (100 mL), extracted with diethyl ether (100 mL, 2×), washed successively with saturated aqueous NaHCO3 (100 mL) and water (100 mL), and dried over anhydrous Na2SO4. After removal of solvent, the crude product was chromatographed on silica gel using dichloromethane-methanol to obtain 5a (140.8 mg, 48% yield). TLC: RF=0.65 (CH2Cl2:MeOH, 95:5 v/v); NMR (in CDCl3): δ in ppm 0.85 (3H, t, J=7.5 Hz), 0.95 (3H, t, J=7.0 Hz) 1.23 (26H, m), 1.54 (2H, m), 2.05 (2H, m), 2.38 (4H, m), 2.80 (10H, m), 3.44-3.50 (5H, m), 3.62-3.68 (2H, m), 3.85 (1H, br s, D2O exchangeable), 5.29-5.35 (12H, m); 13C NMR (in CDCl3): δ in ppm 14.3, 18.3, 22.7, 22.9, 25.7, 25.8 (2), 26.3, 29.6, 29.7 (2), 29.8 (2), 29.9 (2), 32.1, 64.4, 70.7, 72.1, 72.7, 127.2, 127.8, 128.1, 128.2, 128.3 (2), 128.4, 128.5, 128.8, 129.7 (2), 132.2, 177.9; FT-IR (cm−1) 3370 (br), 3013, 2954, 2918, 2850, 1712, 1470, 1397, 1382, 1326, 1239, 1123, 1060, 719; HRAPCI-MS m/z: measured 627.5349 ([M+H]+, calcd. 627.5352 for C41H71O4).

Workup

  1. extractionextracted with diethyl ether (100 mL, 2×)
  2. washwashed successively with saturated aqueous NaHCO3 (100 mL) and water (100 mL)
  3. dry with materialdried over anhydrous Na2SO4
  4. customAfter removal of solvent
  5. customthe crude product was chromatographed on silica gel

Sources & evidence

ORD record
ord-93854593dad64916ae7fb18477ea26bf
Source dataset
uspto-grants-2015_03
Patent number
US08993623B2

Reaction notes

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