1,1,3,3-Tetramethylguanidine → Rac.-(z)-2-[[2-chloro-4-[1-hydroxy-3-(3-hydroxyphenyl)propan-1-yl]benzoyl]amino]-3-(2,4-dimethylthiazol-5-yl)propenoic acid methyl ester

HRID 1058431Notes

Reaction equation

HRID 1058431 reaction equation
CN(C)C(N(C)C)=N.[CH3:9][O:10][C:11](=[O:40])[CH:12](P(OC)(OC)=O)[NH:13][C:14](=[O:33])[C:15]1[CH:20]=[CH:19][C:18]([CH:21]([OH:31])[CH2:22][CH2:23][C:24]2[CH:29]=[CH:28][CH:27]=[C:26]([OH:30])[CH:25]=2)=[CH:17][C:16]=1[Cl:32].[CH3:41][C:42]1[S:43][C:44]([CH:48]=O)=[C:45]([CH3:47])[N:46]=1>O1CCCC1>[CH3:9][O:10][C:11](=[O:40])/[C:12](/[NH:13][C:14](=[O:33])[C:15]1[CH:20]=[CH:19][C:18]([CH:21]([OH:31])[CH2:22][CH2:23][C:24]2[CH:29]=[CH:28][CH:27]=[C:26]([OH:30])[CH:25]=2)=[CH:17][C:16]=1[Cl:32])=[CH:48]/[C:44]1[S:43][C:42]([CH3:41])=[N:46][C:45]=1[CH3:47]

Participants

5

Reactant 3

HCID 664601,1,3,3-TetramethylguanidineHCID 27762492,4-Dimethyl-1,3-thiazole-5-carbaldehydeHCID 18673037N-[2-chloro-4-[1-hydroxy-3-(3-hydroxyphenyl)propan-1-yl]benzoyl]-2-(dimethoxyphosphinyl)glycine methyl ester

Product 1

HCID 59038419Rac.-(z)-2-[[2-chloro-4-[1-hydroxy-3-(3-hydroxyphenyl)propan-1-yl]benzoyl]amino]-3-(2,4-dimethylthiazol-5-yl)propenoic acid methyl esterYield 75%

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent

Procedure

1,1,3,3-Tetramethylguanidine (60 μL, 0.48 mmol) was added to a solution of rac.-N-[2-chloro-4-[1-hydroxy-3-(3-hydroxyphenyl)propan-1-yl]benzoyl]-2-(dimethoxyphosphinyl)glycine methyl ester (Example 134; 120 mg, 0.24 mmol) in tetrahydrofuran (5 mL) at −20° C. After 10 min, 2,4-dimethylthiazole-5-carboxaldehyde (Example 43; 36 mg, 0.255 mmol) was added and the solution was stirred at room temperature for 16 h. After the volatiles were removed in vacuo, ethyl acetate (10 mL) was added. The resulting solution was washed with saturated sodium bicarbonate solution (5 μL) and the aqueous layer was extracted with ethyl acetate. The combined organic layers were dried (MgSO4), filtered, evaporated and chromatographed over silica gel (3:2 ethyl acetate/hexanes). The appropriate fractions were combined, evaporated and the residue triturated with diethyl ether to yield rac.-(Z)-2-[[2-chloro-4-[1-hydroxy-3-(3-hydroxyphenyl)propan-1-yl]benzoyl]amino]-3-(2,4-dimethylthiazol-5-yl)propenoic acid methyl ester (88 mg, 75% yield) as a colorless solid.

Workup

  1. customAfter the volatiles were removed in vacuo, ethyl acetate (10 mL)
  2. additionwas added
  3. washThe resulting solution was washed with saturated sodium bicarbonate solution (5 μL)
  4. extractionthe aqueous layer was extracted with ethyl acetate
  5. dry with materialThe combined organic layers were dried (MgSO4)
  6. filtrationfiltered
  7. customevaporated
  8. customchromatographed over silica gel (3:2 ethyl acetate/hexanes)
  9. customevaporated
  10. customthe residue triturated with diethyl ether

Sources & evidence

ORD record
ord-bd7a53513cca4c92bf7b055fa74746f4
Source dataset
uspto-grants-2003_02
Patent number
US06515124B2

Reaction notes

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