Potassium Carbonate → 5,10,15-tris-(4-Hydroxy-phenyl)-20-(4-nonyloxy-phenyl)-porphyrin

HRID 1296334Notes

Reaction equation

HRID 1296334 reaction equation
[OH:1][C:2]1[CH:7]=[CH:6][C:5]([C:8]2[C:9]3[NH:13][C:12]([C:14]([C:46]4[CH:51]=[CH:50][C:49]([OH:52])=[CH:48][CH:47]=4)=[C:15]4[N:45]=[C:18]([C:19]([C:38]5[CH:43]=[CH:42][C:41]([OH:44])=[CH:40][CH:39]=5)=[C:20]5[NH:37][C:23](=[C:24]([C:30]6[CH:35]=[CH:34][C:33]([OH:36])=[CH:32][CH:31]=6)[C:25]6[CH:26]=[CH:27][C:28]=2[N:29]=6)[CH:22]=[CH:21]5)[CH:17]=[CH:16]4)=[CH:11][CH:10]=3)=[CH:4][CH:3]=1.C(=O)([O-])[O-].[K+].[K+].[CH2:59](Br)[CH2:60][CH2:61][CH2:62][CH2:63][CH2:64][CH2:65][CH2:66][CH3:67]>CN(C=O)C>[OH:52][C:49]1[CH:48]=[CH:47][C:46]([C:14]2[C:12]3[NH:13][C:9]([C:8]([C:5]4[CH:6]=[CH:7][C:2]([O:1][CH2:59][CH2:60][CH2:61][CH2:62][CH2:63][CH2:64][CH2:65][CH2:66][CH3:67])=[CH:3][CH:4]=4)=[C:28]4[N:29]=[C:25]([C:24]([C:30]5[CH:31]=[CH:32][C:33]([OH:36])=[CH:34][CH:35]=5)=[C:23]5[NH:37][C:20](=[C:19]([C:38]6[CH:43]=[CH:42][C:41]([OH:44])=[CH:40][CH:39]=6)[C:18]6[CH:17]=[CH:16][C:15]=2[N:45]=6)[CH:21]=[CH:22]5)[CH:26]=[CH:27]4)=[CH:10][CH:11]=3)=[CH:51][CH:50]=1

Participants

5

Reactant 3

HCID 11430Potassium CarbonateHCID 127421-BromononaneHCID 1354380305,10,15,20-Tetrakis(4-hydroxyphenyl)porphyrin

Product 1

HCID 1360491715,10,15-tris-(4-Hydroxy-phenyl)-20-(4-nonyloxy-phenyl)-porphyrin

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent2×

Conditions

Temperature
55 °C

Procedure

5,10,15,20-tetrakis-(4-Hydroxy-phenyl)-porphyrin (200 mg, 0.294 mmol) is dissolved and potassium carbonate (487 mg, 3.53 mmol, 12 eqv.) is suspended under argon in absolute DMF (50 mL) and the mixture heated to 55° C. A solution of nonyl bromide (49.4 μl, 0.206 mmol, 0.7 eqv.) in absolute DMF (10 mL) is added dropwise during 30 min. The mixture is stirred at 55° C. for 2 h. The solvent is removed in vacuo at 50° C., water (80 mL) is added and the mixture extracted with ethyl acetate (3×40 mL). The combined organic extracts are dried (Na2SO4) and solvent removed under reduced pressure. The product is isolated by chromatography on a column (300 g) of silica. Tetra-alkylated and tri-alkylated compounds are eluted with toluene:ethyl acetate (30:1 by vol.), di-substituted compound (trans-isomer) with toluene:ethyl acetate (15:1 by vol.). di-substituted compound (cis-isomer) with toluene:ethyl acetate (10:1 by vol.) and the desired product (mono-alkylated compound) is eluted with toluene:ethyl acetate (5:1 by vol.). The solvent is removed under reduced pressure and the residue dried at high vacuum to afford the product as a violet solid.

Workup

  1. customThe solvent is removed in vacuo at 50° C.
  2. additionwater (80 mL) is added
  3. extractionthe mixture extracted with ethyl acetate (3×40 mL)
  4. dry with materialThe combined organic extracts are dried (Na2SO4) and solvent
  5. customremoved under reduced pressure
  6. customThe product is isolated by chromatography on a column (300 g) of silica
  7. washTetra-alkylated and tri-alkylated compounds are eluted with toluene:ethyl acetate (30:1 by vol.), di-substituted compound (trans-isomer) with toluene:ethyl acetate (15:1 by vol.)
  8. washdi-substituted compound (cis-isomer) with toluene:ethyl acetate (10:1 by vol.) and the desired product (mono-alkylated compound) is eluted with toluene:ethyl acetate (5:1 by vol.)
  9. customThe solvent is removed under reduced pressure
  10. customthe residue dried at high vacuum

Sources & evidence

ORD record
ord-4e4123dfecf142748e94e0e2d7858776
Source dataset
uspto-grants-2007_07
Patent number
US07244841B2

Reaction notes

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