Pyridine → HCID 86740731, compound

HRID 1380542Notes

Reaction equation

HRID 1380542 reaction equation
[Na].[CH2:2]([C:4]1[CH:5]=[CH:6][C:7]([CH:10]([CH2:27][OH:28])[CH2:11][O:12][C:13]2[CH:26]=[CH:25][C:16]([CH2:17][CH:18]3[S:22][C:21](=[O:23])[NH:20][C:19]3=[O:24])=[CH:15][CH:14]=2)=[N:8][CH:9]=1)[CH3:3].N1C=CC=CC=1.[C:35](OC(=O)C)(=[O:37])[CH3:36]>O>[C:35]([O:28][CH2:27][CH:10]([C:7]1[CH:6]=[CH:5][C:4]([CH2:2][CH3:3])=[CH:9][N:8]=1)[CH2:11][O:12][C:13]1[CH:14]=[CH:15][C:16]([CH2:17][CH:18]2[S:22][C:21](=[O:23])[NH:20][C:19]2=[O:24])=[CH:25][CH:26]=1)(=[O:37])[CH3:36]

Participants

5

Reactant 3

HCID 1049PyridineHCID 7918Acetic AnhydrideHCID 86740732HCID 86740732, compound

Product 1

HCID 86740731HCID 86740731, compound

Reagents, catalysts & solvents 1

HCID 962WaterSolvent

Procedure

A mixture of 5-{4-[2-(5-ethyl-2-pyridyl)-3-hydroxypropoxy]benzyl}-2,4-thiazolidinedione sodium salt (408 mg), pyridine (10 ml) and acetic anhydride (0.15 ml) was stirred at room temperature for 8 hours, and poured in water, followed by extraction with ethyl acetate. The ethyl acetate layer was washed with water, dried (MgSO4) and freed of the solvent. The residue was chromatographed on a silica-gel (20 g) column and elution was effected with benzene-acetone (10:1, V/V) to give 5-{4-[3-acetoxy-2-(5-ethyl-2-pyridyl)propoxy]benzyl}-2,4-thiazolidinedione in the form of an oily substance. Yield of 350 mg (81.8%). IR(Neat): 1740, 1690, 1230 cm-1. NMR (CDCl3)δ: 1.24(3H,t,J=7 Hz), 2.00(3H,s), 2.64(2H,q,J=7 Hz), 3.03(1H,dd,J=14 and 9 Hz), 3.45(1H,dd,J=14 and 9 Hz), 3.60 (1H,m), 4.31(2H,d,J=5 Hz), 4.47(1H,dd,J=9 and 4 Hz), 4.55 (2H,d,J=5 Hz), 6.80(2H,d,J=9 Hz), 7.10(2H,d,J=9 Hz), 7.20(1H,d, J=8 Hz), 7.48(1H,dd,J=8 and 2 Hz), 8.42(1H,d,J=2 Hz).

Workup

  1. extractionfollowed by extraction with ethyl acetate
  2. washThe ethyl acetate layer was washed with water
  3. dry with materialdried (MgSO4)
  4. customThe residue was chromatographed on a silica-gel (20 g) column and elution

Sources & evidence

ORD record
ord-cd05acc54ff64baa8e5796bb86fcf579
Source dataset
uspto-grants-1986_04
Patent number
US04582839

Reaction notes

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