Diisopropylethylamine → HCID 67153303, compound

HRID 1879472Notes

Reaction equation

HRID 1879472 reaction equation
[C:1]([C:3]1[CH:4]=[C:5]([CH:17]=[CH:18][CH:19]=1)[CH2:6][N:7]1[CH:11]([C:12]([OH:14])=O)[CH2:10][CH2:9][S:8]1(=[O:16])=[O:15])#[N:2].N[C@@H:21]([CH2:25]CSSCC[C@H](N)C(O)=O)[C:22](O)=O.CN(C(ON1N=[N:51][C:46]2[CH:47]=[CH:48][CH:49]=[CH:50][C:45]1=2)=[N+](C)C)C.[B-](F)(F)(F)F.[CH:58](N(C(C)C)CC)(C)C>O1CCCC1>[CH3:58][C@@H:45]1[C@@H:46]([NH:51][C:12]([CH:11]2[CH2:10][CH2:9][S:8](=[O:16])(=[O:15])[N:7]2[CH2:6][C:5]2[CH:17]=[CH:18][CH:19]=[C:3]([C:1]#[N:2])[CH:4]=2)=[O:14])[CH2:47][C@H:48]2[CH2:49][C@@H:50]1[C:21]2([CH3:25])[CH3:22]

Participants

6

Reactant 4

HCID 81531DiisopropylethylamineHCID 439579L-HomocystineHCID 2733207O-(Benzotriazol-1-yl)-N,N,N',N'-tetramethyluronium tetrafluoroborateHCID 58280475HCID 58280475, compound

Product 1

HCID 67153303HCID 67153303, compoundYield 81.3%

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent2×

Procedure

To a stirred solution of 2-(3-cyano-benzyl)-1,1-dioxo-1λ6-isothiazolidine-3-carboxylic acid (6.0 g, 21.4 mmol) in tetrahydrofuran (40 mL) was added 1-hydroxybenzotriazole (available from 3B Scientific Corporation, Libertyville, Ill. 60048, USA; 2.8 g, 20.72 mmol), TBTU (6.8 g, 21.18 mmol) and diisopropylethylamine (8.3 g, 64.21 mmol) simultaneously at room temperature. After 16 h of stirring at the same temperature, tetrahydrofuran was distilled off under reduced pressure. The obtained crude residue was extracted with ethyl acetate (120 mL), washed with an aqueous solution of 1N NaOH (50 mL), brine (50 mL), dried over anhydrous sodium sulfate and concentrated under reduced pressure to give a crude mass. The crude mass was purified by silica gel column chromatography (100-200 mesh) using a gradient of 50-70% ethyl acetate/hexanes to give 2-(3-cyano-benzyl)-1,1-dioxo-1λ6-isothiazolidine-3-carboxylic acid((1S,2S,3S,5R)-2,6,6-trimethyl-bicyclo[3.1.1]hept-3-yl)-amide (7.0 g, 79.5%).

Workup

  1. distillationwas distilled off under reduced pressure
  2. customThe obtained crude residue
  3. extractionwas extracted with ethyl acetate (120 mL)
  4. washwashed with an aqueous solution of 1N NaOH (50 mL), brine (50 mL)
  5. dry with materialdried over anhydrous sodium sulfate
  6. concentrationconcentrated under reduced pressure
  7. customto give a crude mass
  8. customThe crude mass was purified by silica gel column chromatography (100-200 mesh)

Sources & evidence

ORD record
ord-4629e66f9b95452ea962fc06fe9de492
Source dataset
uspto-grants-2012_11
Patent number
US08314250B2

Reaction notes

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