Pyridine → HCID 23387551, compound

HRID 1170682Notes

Reaction equation

HRID 1170682 reaction equation
[C:1]([NH:11][C@H:12]([C:16]([O:18][CH2:19][CH:20]([OH:37])[CH2:21][C:22]([CH3:36])([CH3:35])[C:23]([O:25][CH2:26][C:27]1[CH:32]=[CH:31][C:30]([O:33][CH3:34])=[CH:29][CH:28]=1)=[O:24])=[O:17])[CH:13]([CH3:15])[CH3:14])([O:3][CH2:4][C:5]1[CH:10]=[CH:9][CH:8]=[CH:7][CH:6]=1)=[O:2].N1C=CC=CC=1.[C:44](Cl)(=[O:62])[CH2:45][CH2:46][CH2:47][CH2:48][CH2:49][CH2:50][CH2:51][CH2:52][CH2:53][CH2:54][CH2:55][CH2:56][CH2:57][CH2:58][CH2:59][CH2:60][CH3:61]>C(Cl)Cl>[C:1]([NH:11][C@H:12]([C:16]([O:18][CH2:19][CH:20]([O:37][C:44](=[O:62])[CH2:45][CH2:46][CH2:47][CH2:48][CH2:49][CH2:50][CH2:51][CH2:52][CH2:53][CH2:54][CH2:55][CH2:56][CH2:57][CH2:58][CH2:59][CH2:60][CH3:61])[CH2:21][C:22]([CH3:35])([CH3:36])[C:23]([O:25][CH2:26][C:27]1[CH:28]=[CH:29][C:30]([O:33][CH3:34])=[CH:31][CH:32]=1)=[O:24])=[O:17])[CH:13]([CH3:15])[CH3:14])([O:3][CH2:4][C:5]1[CH:6]=[CH:7][CH:8]=[CH:9][CH:10]=1)=[O:2]

Participants

5

Reactant 3

HCID 1049PyridineHCID 8212Stearoyl chlorideHCID 23387550HCID 23387550, compound

Product 1

HCID 23387551HCID 23387551, compoundYield 87%

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent2×

Procedure

To a mixture of 4-methoxybenzyl 5-(N-CBz-L-valyloxy)-4-hydroxy-2,2-dimethylvalerate (20.6 g, 40 mmol), Pyridine (31.6 g, 400 mmol) in CH2Cl2 (500 mL) at 0° C., was added dropwise a solution of stearoyl chloride (18.2 g, 60 mmol) in CH2Cl2 (100 mL). After 1 h at 0° C., the temperature of the reaction mixture was allowed to assume room temperature and then the mixture was stirred for 5 h at room temperature. The mixture was extracted with a 10% aqueous solution of NaHCO3 (300 mL) and the aqueous phase was washed with CH2Cl2 (200 mL). The combined organic layers were dried (Na2SO4) and concentrated under reduced pressure. The crude product was column chromatographed (silica gel, 1→5% MeOH in CH2Cl2), to give 27.2 g of 4-methoxybenzyl 5-(N-CBz-L-valyloxy)-4-stearoyloxy-2,2-dimethylvalerate.

Workup

  1. customto assume room temperature
  2. extractionThe mixture was extracted with a 10% aqueous solution of NaHCO3 (300 mL)
  3. washthe aqueous phase was washed with CH2Cl2 (200 mL)
  4. dry with materialThe combined organic layers were dried (Na2SO4)
  5. concentrationconcentrated under reduced pressure
  6. customchromatographed (silica gel, 1→5% MeOH in CH2Cl2)

Sources & evidence

ORD record
ord-36b6dc0672634189b2488966a3f0d645
Source dataset
uspto-grants-2010_11
Patent number
US07825238B2

Reaction notes

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