4-Chlorobenzenesulfonyl chloride → HCID 69920461, compound

HRID 1250862Notes

Reaction equation

HRID 1250862 reaction equation
[NH2:1][C@H:2]([C:17]([O:19][C:20]([CH3:23])([CH3:22])[CH3:21])=[O:18])[CH2:3][C:4]1[CH:16]=[CH:15][C:7]([O:8][CH2:9][CH2:10][CH2:11][C:12]([OH:14])=[O:13])=[CH:6][CH:5]=1.[Cl:24][C:25]1[CH:30]=[CH:29][C:28]([S:31](Cl)(=[O:33])=[O:32])=[CH:27][CH:26]=1.C(N(C(C)C)CC)(C)C>CN(C=O)C>[C:20]([O:19][C:17]([C@@H:2]([NH:1][S:31]([C:28]1[CH:29]=[CH:30][C:25]([Cl:24])=[CH:26][CH:27]=1)(=[O:33])=[O:32])[CH2:3][C:4]1[CH:16]=[CH:15][C:7]([O:8][CH2:9][CH2:10][CH2:11][C:12]([OH:14])=[O:13])=[CH:6][CH:5]=1)=[O:18])([CH3:23])([CH3:22])[CH3:21]

Participants

5

Reactant 3

HCID 73984-Chlorobenzenesulfonyl chlorideHCID 81531DiisopropylethylamineHCID 699227854-[4-((2S)-2-amino-2-tert-butoxycarbonyl-ethyl)-phenoxy]-butyric acid

Product 1

HCID 69920461HCID 69920461, compound

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent

Conditions

Temperature
0 °C

Procedure

200 mg of 4-[4-((2S)-2-amino-2-tert-butoxycarbonyl-ethyl)-phenoxy]-butyric acid were dissolved in 2 ml of DMF and cooled to 0° C. 220 mg of 4-chlorobenzenesulfonyl chloride and 270 mg of diisopropylethylamine were added and the reaction mixture was stirred at 0° C. for 2 hours. The reaction mixture was cooled to −25° C. for 16 hours and then warmed to room temperature. The reaction was quenched by the addition of water, and the mixture was extracted three times with dichloromethane. The combined organic phases were dried with sodium sulfate, filtered and the solvent was removed in vacuo. The residue was chromatographed on silica gel eluting with dichloromethane/methanol/water/acetic acid (9/1/0.1/0.1). Yield 84 mg. MS (ES+): m/e=498.1 (M+H)+; 442.1.

Workup

  1. temperatureThe reaction mixture was cooled to −25° C. for 16 hours
  2. temperaturewarmed to room temperature
  3. customThe reaction was quenched by the addition of water
  4. extractionthe mixture was extracted three times with dichloromethane
  5. dry with materialThe combined organic phases were dried with sodium sulfate
  6. filtrationfiltered
  7. customthe solvent was removed in vacuo
  8. customThe residue was chromatographed on silica gel eluting with dichloromethane/methanol/water/acetic acid (9/1/0.1/0.1)

Sources & evidence

ORD record
ord-50f4375e25f64d2e8bea1670f24dbc54
Source dataset
uspto-grants-2002_01
Patent number
US06340679B1

Reaction notes

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