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

HRID 554752Notes

Reaction equation

HRID 554752 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

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. washwashed with saturated NaHCO3 (20 mL)
  2. dry with materialThe organic phase was dried over anhydrous Na2SO4
  3. filtrationfiltered
  4. concentrationconcentrated in vacuo

Sources & evidence

ORD record
ord-6ad57969c4b14921956df8424e557f76
Source dataset
uspto-grants-2011_11
Patent number
US08049019B2

Reaction notes

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