Triethylamine → t-Butyl 5-bromo-1-((5-chlorothiazol-2-yl)carbamoyl)spiro[indoline-3,3'-pyrrolidine]-1'-carboxylate

HRID 1411231Notes

Reaction equation

HRID 1411231 reaction equation
[Br:1][C:2]1[CH:3]=[C:4]2[C:10]3([CH2:14][CH2:13][N:12]([C:15]([O:17][C:18]([CH3:21])([CH3:20])[CH3:19])=[O:16])[CH2:11]3)[CH2:9][NH:8][C:5]2=[CH:6][CH:7]=1.[Cl:22][C:23]1[S:27][C:26]([NH:28][C:29](=O)[O:30]C2C=CC([N+]([O-])=O)=CC=2)=[N:25][CH:24]=1.C(N(CC)CC)C>CN(C=O)C.O>[Br:1][C:2]1[CH:3]=[C:4]2[C:10]3([CH2:14][CH2:13][N:12]([C:15]([O:17][C:18]([CH3:21])([CH3:20])[CH3:19])=[O:16])[CH2:11]3)[CH2:9][N:8]([C:29](=[O:30])[NH:28][C:26]3[S:27][C:23]([Cl:22])=[CH:24][N:25]=3)[C:5]2=[CH:6][CH:7]=1

Participants

6

Reactant 3

HCID 8471TriethylamineHCID 860419494-Nitrophenyl (5-chlorothiazol-2-yl)carbamateHCID 90449270t-Butyl 5-bromospiro[indoline-3,3'-pyrrolidine]-1'-carboxylate

Product 1

HCID 71522963t-Butyl 5-bromo-1-((5-chlorothiazol-2-yl)carbamoyl)spiro[indoline-3,3'-pyrrolidine]-1'-carboxylateYield 64%

Reagents, catalysts & solvents 2

HCID 962WaterSolventHCID 6228DimethylformamideSolvent

Conditions

Temperature
50 °C

Procedure

2-Amino-5-chlorothiazole hydrochloride (1.00 g, 5.80 mmol) was dissolved in methylene chloride (50 mL), and the obtained solution was then washed with a saturated aqueous solution of sodium hydrogen carbonate. The resulting solution was dried over anhydrous sodium sulfate and was then filtered. After that, pyridine (0.47 mL, 5.80 mmol) and 4-nitrophenyl chloroformate (1.18 g, 5.80 mmol) were added to the filtrate, and the obtained mixture was then stirred at room temperature for 3 hours. Thereafter, a solid was collected by filtration, was then washed with methylene chloride, and was then dried to obtain 4-nitrophenyl (5-chlorothiazol-2-yl)carbamate (980 mg, 56%) in the form of a white solid. t-Butyl 5-bromospiro[indoline-3,3′-pyrrolidine]-1′-carboxylate (65.1 mg, 0.184 mmol) synthesized by a method described in the known method (International Publication WO2009/089454) or a method similar thereto was dissolved in N,N′-dimethylformamide (2 mL). Thereafter, 4-nitrophenyl (5-chlorothiazol-2-yl)carbamate (55.2 mg, 0.184 mmol) and triethylamine (13 μL, 0.092 mmol) were added to the above obtained solution, and the obtained mixture was then stirred at 50° C. for 3 hours. Thereafter, the reaction solution was diluted with water, and was then extracted with ethyl acetate. The organic layer was washed with brine, and was then dried over anhydrous sodium sulfate, followed by concentration in vacuo. The obtained residue was purified by silica gel column chromatography (hexane:ethyl acetate=2:1) to obtain the captioned compound (60.0 mg, 64%) in the form of a white solid.

Workup

  1. extractionwas then extracted with ethyl acetate
  2. washThe organic layer was washed with brine
  3. dry with materialwas then dried over anhydrous sodium sulfate
  4. concentrationfollowed by concentration in vacuo
  5. customThe obtained residue was purified by silica gel column chromatography (hexane:ethyl acetate=2:1)

Sources & evidence

ORD record
ord-328083acbd0c4952996c8884490e9a01
Source dataset
uspto-grants-2014_12
Patent number
US08921576B2

Reaction notes

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