Cesium carbonate → 1-(2-Chloro-4-(3-((7-methoxy-1,5-naphthyridin-4-ylamino)methyl)-[1,2,4]triazolo[4,3-b]pyridazin-6-yl)phenyl)ethanol

HRID 40284Notes

Reaction equation

HRID 40284 reaction equation
[Cl:1][C:2]1[CH:7]=[C:6](B2OC(C)(C)C(C)(C)O2)[CH:5]=[CH:4][C:3]=1[CH:17]([OH:19])[CH3:18].Cl[C:21]1[CH:22]=[CH:23][C:24]2[N:25]([C:27]([CH2:30][NH:31][C:32]3[C:41]4[C:36](=[CH:37][C:38]([O:42][CH3:43])=[CH:39][N:40]=4)[N:35]=[CH:34][CH:33]=3)=[N:28][N:29]=2)[N:26]=1.C(=O)([O-])[O-].[Cs+].[Cs+]>O1CCOCC1.O.C1C=CC([PH+]([C]2[CH][CH][CH][CH]2)C2C=CC=CC=2)=CC=1.C1C=CC([PH+]([C]2[CH][CH][CH][CH]2)C2C=CC=CC=2)=CC=1.C(Cl)Cl.Cl[Pd]Cl.[Fe]>[Cl:1][C:2]1[CH:7]=[C:6]([C:21]2[CH:22]=[CH:23][C:24]3[N:25]([C:27]([CH2:30][NH:31][C:32]4[C:41]5[C:36](=[CH:37][C:38]([O:42][CH3:43])=[CH:39][N:40]=5)[N:35]=[CH:34][CH:33]=4)=[N:28][N:29]=3)[N:26]=2)[CH:5]=[CH:4][C:3]=1[CH:17]([OH:19])[CH3:18]

Participants

7

Reactant 3

HCID 10796Cesium carbonateHCID 44180710N-((6-chloro-[1,2,4]triazolo[4,3-b]pyridazin-3-yl)methyl)-7-methoxy-1,5-naphthyridin-4-amineHCID 574162301-(2-Chloro-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl)ethanol

Product 1

HCID 576912091-(2-Chloro-4-(3-((7-methoxy-1,5-naphthyridin-4-ylamino)methyl)-[1,2,4]triazolo[4,3-b]pyridazin-6-yl)phenyl)ethanol

Reagents, catalysts & solvents 3

HCID 53485975CID 53485975CatalystHCID 962WaterSolventHCID 312751,4-DioxaneSolvent

Conditions

Temperature
100 °C

Procedure

A suspension of 1-(2-chloro-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl)ethanol (228 mg, 807 μmol), N-((6-chloro-[1,2,4]triazolo[4,3-b]pyridazin-3-yl)methyl)-7-methoxy-1,5-naphthyridin-4-amine (197 mg, 576 μmol), dichloro[1,1′bis(diphenylphoshino)ferrocene]palladium(ii)dichloromethane adduct (127 mg, 173 μmol), cesium carbonate (751 mg, 2306 μmol) in dioxane (3 mL) and water (0.6 mL) was sparged with argon for 5 min then heated to 100° C. for 6 h. Reaction cooled then partitioned between 9:1 CHCl3/IPA (20 mL) and 1M NaOH (15 mL). Aqueous further extracted with 9:1 CHCl3/IPA (2×10 mL). The combined organics dried over MgSO4. concentrated, then purified on 40 g silica eluting with an isocratic 7% 2M NH3 in MeOH/DCM. Product further purified prep HPLC eluting with water/ACN (0.1% TFA). After collected fractions were reduced to a clear the residue was dissolved in 1:1 ACN/water and pH adjusted to 9 with 1M NaOH (3-4 drops). Resulting solid collected by filteration and solid washed with water (2 mL). MS (ESI pos. ion) m/z: 462 (MH+). Calc'd exact mass for C23H20ClN7O2: 461.

Workup

  1. customwas sparged with argon for 5 min
  2. customReaction
  3. temperaturecooled
  4. customthen partitioned between 9:1 CHCl3/IPA (20 mL) and 1M NaOH (15 mL)
  5. extractionAqueous further extracted with 9:1 CHCl3/IPA (2×10 mL)
  6. dry with materialThe combined organics dried over MgSO4
  7. concentrationconcentrated
  8. custompurified on 40 g silica eluting with an isocratic 7% 2M NH3 in MeOH/DCM
  9. washProduct further purified prep HPLC eluting with water/ACN (0.1% TFA)
  10. customAfter collected fractions
  11. dissolutionwas dissolved in 1:1 ACN/water
  12. customResulting solid
  13. customcollected by filteration and solid
  14. washwashed with water (2 mL)

Sources & evidence

ORD record
ord-48e4ac7d27ae422c99ad679a6ab05836
Source dataset
uspto-grants-2013_09
Patent number
US08524900B2

Reaction notes

Loading…