Water → (2S)-2-Cyclopentyl-2-hydroxy-2-thien-2-ylacetic Acid (3S)-1-azabicyclo[2.2.2]oct-3-yl ester

HRID 1366722Notes

Reaction equation

HRID 1366722 reaction equation
[CH:1]1([C@@:6]([OH:15])([C:10]2[S:11][CH:12]=[CH:13][CH:14]=2)[C:7]([OH:9])=[O:8])[CH2:5][CH2:4][CH2:3][CH2:2]1.C(N1C=CN=C1)(N1C=CN=C1)=O.O[C@H:29]1[CH:34]2[CH2:35][CH2:36][N:31]([CH2:32][CH2:33]2)[CH2:30]1.O>CN(C=O)C>[N:31]12[CH2:36][CH2:35][CH:34]([CH2:33][CH2:32]1)[C@H:29]([O:8][C:7](=[O:9])[C@:6]([CH:1]1[CH2:5][CH2:4][CH2:3][CH2:2]1)([OH:15])[C:10]1[S:11][CH:12]=[CH:13][CH:14]=1)[CH2:30]2

Participants

6

Reactant 4

HCID 962WaterHCID 682631,1'-CarbonyldiimidazoleHCID 7364113-Quinuclidinol, (+)-HCID 66608566HCID 66608566, compound

Product 1

HCID 66959269(2S)-2-Cyclopentyl-2-hydroxy-2-thien-2-ylacetic Acid (3S)-1-azabicyclo[2.2.2]oct-3-yl esterYield 47.7%

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent

Procedure

510 mg (0.00225 mol) of (2S)-2-Cyclopentyl-2-hydroxy-2-thien-2-ylacetic acid (obtained by hydrolysis of Intermediate I-15a) were dissolved in 7 ml of DMF. This solution was stirred at room temperature and 638 mg (0.00393 mol) of 1,1′-carbonyldiimidazole were added in several portions. After 4.5 h the reaction mixture was cooled to 0° C. and 315 mg (0.00248 mol) of (3S)-3-hydroxy-1-azabicyclo[2.2.2]octane and 83 mg (0.0021 mol) of HNa (60% dispersion in mineral oil) were added thereto. After stirring 112 h at room temperature the reaction mixture was treated with water and extracted three times with diethyl ether. The organic layers were combined, washed with brine and dried over anhydrous magnesium sulfate. The solvent was evaporated and the residue was purified by silica gel column chromatography (eluent CHCl3/MeOH 15:1) to obtain 360 mg (47.6%) of the title product as an oil, structure confirmed by 1H-RMN.

Workup

  1. temperatureAfter 4.5 h the reaction mixture was cooled to 0° C.
  2. stirringAfter stirring 112 h at room temperature the reaction mixture
  3. extractionextracted three times with diethyl ether
  4. washwashed with brine
  5. dry with materialdried over anhydrous magnesium sulfate
  6. customThe solvent was evaporated
  7. customthe residue was purified by silica gel column chromatography (eluent CHCl3/MeOH 15:1)

Sources & evidence

ORD record
ord-bbfdf4f1b7c74e4fa6b486363fdc8a91
Source dataset
uspto-grants-2011_02
Patent number
US07893087B2

Reaction notes

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