Acetic Anhydride → benzyl (S)-1-((1S,2R,4R)-2-acetamido-4-(tert-butylamino)cyclohexyl)-2-oxopyrrolidin-3-ylcarbamate

HRID 1866108Notes

Reaction equation

HRID 1866108 reaction equation
[NH2:1][C@@H:2]1[CH2:7][C@H:6]([NH:8][C:9]([CH3:12])([CH3:11])[CH3:10])[CH2:5][CH2:4][C@@H:3]1[N:13]1[CH2:17][CH2:16][C@H:15]([NH:18][C:19](=[O:28])[O:20][CH2:21][C:22]2[CH:27]=[CH:26][CH:25]=[CH:24][CH:23]=2)[C:14]1=[O:29].C(N(CC)CC)C.[C:37](OC(=O)C)(=[O:39])[CH3:38]>ClCCl>[C:37]([NH:1][C@@H:2]1[CH2:7][C@H:6]([NH:8][C:9]([CH3:12])([CH3:11])[CH3:10])[CH2:5][CH2:4][C@@H:3]1[N:13]1[CH2:17][CH2:16][C@H:15]([NH:18][C:19](=[O:28])[O:20][CH2:21][C:22]2[CH:23]=[CH:24][CH:25]=[CH:26][CH:27]=2)[C:14]1=[O:29])(=[O:39])[CH3:38]

Participants

5

Reactant 3

HCID 7918Acetic AnhydrideHCID 8471TriethylamineHCID 86618142benzyl (S)-1-((1S,2R,4R)-2-amino-4-(tert-butylamino)cyclohexyl)-2-oxopyrrolidin-3-ylcarbamate

Product 1

HCID 25031312benzyl (S)-1-((1S,2R,4R)-2-acetamido-4-(tert-butylamino)cyclohexyl)-2-oxopyrrolidin-3-ylcarbamateYield 90%

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent2×

Procedure

Example 1, Alternative Preparation, Step 7: A solution of benzyl (S)-1-((1S,2R,4R)-2-amino-4-(tert-butylamino)cyclohexyl)-2-oxopyrrolidin-3-ylcarbamate (22 mg, 0.055 mmol) in dichloromethane (2 mL) was charged sequentially with triethylamine (11.1 mg, 2 eq) and acetic anhydride (6.1 mg, 1.1 eq). The reaction was stirred for 1.5 h at room temperature, diluted with dichloromethane (50 mL) and washed with saturated NaHCO3 (20 mL). The organic phase was dried over anhydrous Na2SO4, filtered, and concentrated in vacuo to give benzyl (S)-1-((1S,2R,4R)-2-acetamido-4-(tert-butylamino)cyclohexyl)-2-oxopyrrolidin-3-ylcarbamate (22 mg, 90%). LC/MS found [M+H]+=445.

Workup

  1. customExample 1, Alternative Preparation, Step 7
  2. washwashed with saturated NaHCO3 (20 mL)
  3. dry with materialThe organic phase was dried over anhydrous Na2SO4
  4. filtrationfiltered
  5. concentrationconcentrated in vacuo

Sources & evidence

ORD record
ord-574b0182840242ef9adc731889b1e035
Source dataset
uspto-grants-2009_12
Patent number
US07629351B2

Reaction notes

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