1,2-Dimethoxyethane → (S)-isopropyl (1-(3-(2-methoxy-6-methylpyridin-3-yl)imidazo[1,2-b]pyridazin-6-yl)pyrrolidin-3-yl)(methyl)carbamate

HRID 870780Notes

Reaction equation

HRID 870780 reaction equation
[CH:1]([O:4][C:5](=[O:23])[N:6]([C@H:8]1[CH2:12][CH2:11][N:10]([C:13]2[CH:14]=[CH:15][C:16]3[N:17]([C:19](Br)=[CH:20][N:21]=3)[N:18]=2)[CH2:9]1)[CH3:7])([CH3:3])[CH3:2].[CH3:24][O:25][C:26]1[C:31](B(O)O)=[CH:30][CH:29]=[C:28]([CH3:35])[N:27]=1.[O-]P([O-])([O-])=O.[K+].[K+].[K+].COCCOC>CCOC(C)=O.C1C=CC(P(C2C=CC=CC=2)[C-]2C=CC=C2)=CC=1.C1C=CC(P(C2C=CC=CC=2)[C-]2C=CC=C2)=CC=1.Cl[Pd]Cl.[Fe+2].O>[CH:1]([O:4][C:5](=[O:23])[N:6]([C@H:8]1[CH2:12][CH2:11][N:10]([C:13]2[CH:14]=[CH:15][C:16]3[N:17]([C:19]([C:31]4[C:26]([O:25][CH3:24])=[N:27][C:28]([CH3:35])=[CH:29][CH:30]=4)=[CH:20][N:21]=3)[N:18]=2)[CH2:9]1)[CH3:7])([CH3:3])[CH3:2]

Participants

8

Reactant 4

HCID 80711,2-DimethoxyethaneHCID 62657Potassium Phosphate, TribasicHCID 27631212-Methoxy-6-methylpyridine-3-boronic acidHCID 86696483(S)-isopropyl (1-(3-bromoimidazo[1,2-b]pyridazin-6-yl)pyrrolidin-3-yl)(methyl)carbamate

Product 1

HCID 86696489(S)-isopropyl (1-(3-(2-methoxy-6-methylpyridin-3-yl)imidazo[1,2-b]pyridazin-6-yl)pyrrolidin-3-yl)(methyl)carbamateYield 54.9%

Reagents, catalysts & solvents 3

HCID 178418228Bis(cyclopenta-1,4-dien-1-yl(diphenyl)phosphane);dichloropalladium;iron(2+)CatalystHCID 962WaterSolventHCID 8857Ethyl AcetateSolvent

Procedure

To 80 mg (0.217 mmol) of (S)-isopropyl(1-(3-bromoimidazo[1,2-b]pyridazin-6-yl)pyrrolidin-3-yl)(methyl)carbamate in a microwave vial was added, 54 mg (0.326 mmol) of (2-methoxy-6-methylpyridin-3-yl)boronic acid, 92 mg (0.435 mmol) of K3PO4, 18 mg (0.022 mmol) PdCl2(dppf)2, 3 mL of DME and then 1 mL water. The resulting mixture was microwaved at 140° C. for 0.5 hr. It was diluted with EtOAc, washed with brine, and the organic layer was dried over MgSO4. It was concentrated and purified on the neutral PREP HPLC to obtain 50.6 mg of the desired product. 1H NMR (400 MHz, CHLOROFORM-d) δ ppm 1.30 (d, J=6.32 Hz, 6H) 2.13-2.31 (m, 2H) 2.53 (s, 3H) 2.89 (s, 3H) 3.43 (dd, J=10.61, 7.07 Hz, 1H) 3.49-3.56 (m, 1H) 3.70-3.76 (m, 2H) 4.06 (s, 3H) 4.99 (m, 2H) 6.61 (d, J=9.85 Hz, 1H) 6.89 (d, J=7.83 Hz, 1H) 7.79 (d, J=9.85 Hz, 1H) 8.12 (s, 1H) 8.69 (d, J=7.83 Hz, 1H). LRMS (ESI) m/e 425 [(M+H)+, calcd for C22H28N6O3 424].

Workup

  1. customThe resulting mixture was microwaved at 140° C. for 0.5 hr
  2. washwashed with brine
  3. dry with materialthe organic layer was dried over MgSO4
  4. concentrationIt was concentrated
  5. custompurified on the neutral PREP HPLC

Sources & evidence

ORD record
ord-9ada7da08d704948a88a3ac4299df449
Source dataset
uspto-grants-2015_03
Patent number
US08969565B2

Reaction notes

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