Water → 6-Ethoxy-pyridazine-3-carboxylic acid n-[2-(2,6-dioxo-piperidin-3-yl)-1-oxo-2,3-dihydro-1h-isoindol-5-ylmethyl]-6-ethoxy-nicotinamide

HRID 331577Notes

Reaction equation

HRID 331577 reaction equation
[CH2:1]([O:3][C:4]1[CH:12]=[CH:11][C:7]([C:8]([OH:10])=[O:9])=[CH:6][N:5]=1)[CH3:2].C1N=C[N:15](C(N2C=NC=C2)=O)C=1.CS(O)(=O)=O.[NH2:30][CH2:31][C:32]1[CH:33]=[C:34]2[C:38](=[CH:39][CH:40]=1)[C:37](=[O:41])[N:36]([CH:42]1[CH2:47][CH2:46][C:45](=[O:48])[NH:44][C:43]1=[O:49])[CH2:35]2.O>CN(C)C=O>[O:49]=[C:43]1[CH:42]([N:36]2[CH2:35][C:34]3[C:38](=[CH:39][CH:40]=[C:32]([CH2:31][NH:30][C:8](=[O:10])[C:7]4[CH:11]=[CH:12][C:4]([O:3][CH2:1][CH3:2])=[N:5][CH:6]=4)[CH:33]=3)[C:37]2=[O:41])[CH2:47][CH2:46][C:45](=[O:48])[NH:44]1.[CH2:1]([O:3][C:4]1[N:5]=[N:15][C:7]([C:8]([OH:10])=[O:9])=[CH:11][CH:12]=1)[CH3:2]

Participants

6

Reactant 4

HCID 962WaterHCID 682631,1'-CarbonyldiimidazoleHCID 64858176-Ethoxypyridine-3-carboxylic acidHCID 866307653-(5-(Aminomethyl)-1-oxoisoindolin-2-yl)piperidine-2,6-dione methanesulfonate

Product 1

HCID 670231656-Ethoxy-pyridazine-3-carboxylic acid n-[2-(2,6-dioxo-piperidin-3-yl)-1-oxo-2,3-dihydro-1h-isoindol-5-ylmethyl]-6-ethoxy-nicotinamideYield 72.6%

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent

Conditions

Temperature
40 °C

Procedure

A stirred mixture of 6-ethoxy-nicotinic acid (0.23 g, 1.40 mmol) and CDI (0.24 g, 1.50 mmol) in N,N-dimethylformamide (10 mL) was heated to 40° C. under nitrogen. After 1 h, 3-(5-aminomethyl-1-oxo-1,3-dihydro-isoindol-2-yl)-piperidine-2,6-dione methane sulfonate (0.5 g, 1.40 mmol) was added and the mixture was heated at 50° C. for 1.5 h. The mixture was cooled to rt and water (20 mL) was added. The solids were isolated by filtration and then triturated in EtOAc (20 mL) for 18 h. The product was filtered and dried in vacuo to give 6-ethoxy-pyridazine-3-carboxylic acid N-[2-(2,6-dioxo-piperidin-3-yl)-1-oxo-2,3-dihydro-1H-isoindol-5-ylmethyl]-6-ethoxy-nicotinamide as a white solid (0.30 g, 53% yield): HPLC: Waters Symmetry C18, 5 μm, 3.9×150 mm, 1 mL/min, 240 nm, 10/90 to 90/10 CH3CN/0.1% H3PO4 gradient over 15 mins, 7.12 min (95.33%); mp: 255-257° C.; 1H NMR (DMSO-d6) δ 1.33 (t, J=7.1 Hz, 3H, CH3), 1.84-2.14 (m, 1H, CHH), 2.27-2.47 (m, 1H, CHH), 2.60 (d, J=16.8 Hz, 1H, CHH), 2.80-3.09 (m, 1H, CHH), 4.21-4.52 (m, 4H, CH2, CH2), 4.59 (d, J=5.9 Hz, 2H, CH2), 5.11 (dd, J=5.1, 13.2 Hz, 1H, CH), 6.88 (d, J=8.7 Hz, 1H, Ar), 7.47 (d, J=7.9 Hz, 1H, Ar), 7.55 (s, 1H, Ar), 7.70 (d, J=7.7 Hz, 1H, Ar), 8.16 (dd, J=2.5, 8.7 Hz, 1H, Ar), 8.71 (d, J=2.3 Hz, 1H, Ar), 9.14 (t, J=5.9 Hz, 1H, NH), 10.98 (s, 1H, NH); 13C NMR (DMSO-d6) δ 14.40, 22.49, 31.20, 42.60, 47.12, 51.58, 61.80, 110.19, 122.07, 122.94, 123.26, 127.07, 130.39, 138.18, 142.40, 143.80, 147.10, 164.61, 164.91, 167.92, 170.98, 172.85; LCMS: MH=423; Anal Calcd for C22H22N4O5: C, 62.55; H, 5.25; N, 13.26. Found: C, 62.24; H, 5.19; N, 13.15.

Workup

  1. temperaturethe mixture was heated at 50° C. for 1.5 h
  2. temperatureThe mixture was cooled to rt
  3. customThe solids were isolated by filtration
  4. customtriturated in EtOAc (20 mL) for 18 h
  5. filtrationThe product was filtered
  6. customdried in vacuo

Sources & evidence

ORD record
ord-6133f6b9c30d4fd084995b138bf2c5ef
Source dataset
uspto-grants-2014_11
Patent number
US08877780B2

Reaction notes

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