(2-Methoxyethoxy)acetic acid → 1-{4-[4-(Benzothiazol-6-ylamino)-7H-pyrrolo[2,3-d]-pyrimidin-6-yl]-3,6-dihydro-2H-pyridin-1-yl}-2-(2-methoxyethoxy)-ethanone

HRID 2375840Notes

Reaction equation

HRID 2375840 reaction equation
Cl.Cl.Cl.[S:4]1[C:8]2[CH:9]=[C:10]([NH:13][C:14]3[C:15]4[CH:22]=[C:21]([C:23]5[CH2:24][CH2:25][NH:26][CH2:27][CH:28]=5)[NH:20][C:16]=4[N:17]=[CH:18][N:19]=3)[CH:11]=[CH:12][C:7]=2[N:6]=[CH:5]1.ON1C2C=CC=CC=2N=N1.N=C=N.C(N(CC)C(C)C)(C)C.[CH3:51][O:52][CH2:53][CH2:54][O:55][CH2:56][C:57](O)=[O:58]>CN(C)C=O>[S:4]1[C:8]2[CH:9]=[C:10]([NH:13][C:14]3[C:15]4[CH:22]=[C:21]([C:23]5[CH2:24][CH2:25][N:26]([C:57](=[O:58])[CH2:56][O:55][CH2:54][CH2:53][O:52][CH3:51])[CH2:27][CH:28]=5)[NH:20][C:16]=4[N:17]=[CH:18][N:19]=3)[CH:11]=[CH:12][C:7]=2[N:6]=[CH:5]1

Participants

7

Reactant 5

HCID 27642(2-Methoxyethoxy)acetic acid2×HCID 757711-HydroxybenzotriazoleHCID 81531DiisopropylethylamineHCID 160435CarbodiimideHCID 69274170Benzothiazol-6-yl-[6-(1,2,3,6-tetrahydropyridin-4-yl)-7H-pyrrolo[2,3-d]pyrimidin-4-yl]amine trihydrochloride

Product 1

HCID 116983751-{4-[4-(Benzothiazol-6-ylamino)-7H-pyrrolo[2,3-d]-pyrimidin-6-yl]-3,6-dihydro-2H-pyridin-1-yl}-2-(2-methoxyethoxy)-ethanone

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent3×

Procedure

To a suspension of benzothiazol-6-yl-[6-(1,2,3,6-tetrahydropyridin-4-yl)-7H-pyrrolo[2,3-d]pyrimidin-4-yl]-amine tris-hydrochloride (138.0 mg, 0.2984 mmol), 1-hydroxybenzotriazole (40.8 mg, 0.302 mmol), and PS-Carbodiimide (1.37 mmol/g loading; 873 mg, 1.20 mmol) in anhydrous N,N-dimethylformamide (10 mL), N,N-diisopropylethylamine (260 μL, 1.5 mmol) was added. A small amount of sonication was used to get majority of solid into solution. 2-(2-Methoxyethoxy)acetic acid (45.7 mg, 0.334 mmol) in anhydrous DMF (1 mL) was added, and the reaction was vigorously shaken at rt for 5.5 h. An additional 0.2 eq of 2-(2-methoxyethoxy)acetic acid (8.1 mg, 0.060 mmol) in anhydrous N,N-dimethylformamide (0.5 mL) was added (after 7 h), and the reaction was shaken overnight at rt. The resin was filtered off (M-size frit) and rinsed several times with DMF. The filtrate was concentrated in vacuo at medium temp (bath temp: max 43° C.), redissolved in MeOH and DCM, and concentrated again under reduced pressure. The crude material was adsorbed onto Hydromatrix, dry loaded, and purified by chromatography on silica gel [Jones Flashmaster, 10 g/70 mL cartridge, eluting with MeOH:DCM 2%→5%→10%]. Fractions containing product were combined and concentrated in vacuo, affording the title compound, as an off-white solid. The material was further purified by trituration in MeOH/sonication, affording the title compound, as an off-white solid. 1H NMR (400 MHz, DMSO-d6): δ=2.36-2.56 (s, br, rotamers, 2H), 3.19 (s, 3H), 2.38-2.45 (m, 2H), 3.49-3.55 (m, 2H), 3.58 & 3.64 (t, J=5.2 Hz, rotamers, 2H), 4.08 & 4.10 (s, br, rotamers, 2H), 4.14 & 4.18 (s, rotamers, 2H), 6.37 (s, br, 1H), 6.77 & 6.78 (s, rotamers, 1H), 7.80 (dd, J=8.8, 2.0 Hz, 1H), 7.97 (d, J=8.8 Hz, 1H), 8.28 (s, 1H), 8.85 (s, 1H), 9.17 (s, 1H), 9.54 (s, —NH), 11.95 (d, J=9.2 Hz, —NH). MS (ES+): m/z 465.01 (100) [MH+]. HPLC: tR=2.24 min (ZQ2000, polar—5 min).

Workup

  1. customA small amount of sonication
  2. customto get majority of solid into solution
  3. stirringthe reaction was shaken overnight at rt
  4. filtrationThe resin was filtered off (M-size frit)
  5. washrinsed several times with DMF
  6. concentrationThe filtrate was concentrated in vacuo at medium temp (bath temp: max 43° C.)
  7. dissolutionredissolved in MeOH
  8. concentrationDCM, and concentrated again under reduced pressure
  9. customdry loaded
  10. custompurified by chromatography on silica gel [Jones Flashmaster, 10 g/70 mL cartridge, eluting with MeOH:DCM 2%→5%→10%]
  11. additionFractions containing product
  12. concentrationconcentrated in vacuo

Sources & evidence

ORD record
ord-c49c4cfcb0d44380a7b98995dbdadbf5
Source dataset
uspto-grants-2008_12
Patent number
US07465726B2

Reaction notes

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