Methyl 3-mercaptopropionate → Tert-butyl 4-((2-(5-(3-methoxy-3-oxopropylthio)-3-phenoxypyridin-2-ylamino)thiazol-4-yl)methyl)piperidine-1-carboxylate

HRID 911938Notes

Reaction equation

HRID 911938 reaction equation
Br[C:2]1[CH:3]=[C:4]([O:28][C:29]2[CH:34]=[CH:33][CH:32]=[CH:31][CH:30]=2)[C:5]([NH:8][C:9]2[S:10][CH:11]=[C:12]([CH2:14][CH:15]3[CH2:20][CH2:19][N:18]([C:21]([O:23][C:24]([CH3:27])([CH3:26])[CH3:25])=[O:22])[CH2:17][CH2:16]3)[N:13]=2)=[N:6][CH:7]=1.C(N(C(C)C)C(C)C)C.C1(P(C2C=CC=CC=2)C2C3OC4C(=CC=CC=4P(C4C=CC=CC=4)C4C=CC=CC=4)C(C)(C)C=3C=CC=2)C=CC=CC=1.[SH:86][CH2:87][CH2:88][C:89]([O:91][CH3:92])=[O:90]>C1C=CC(/C=C/C(/C=C/C2C=CC=CC=2)=O)=CC=1.C1C=CC(/C=C/C(/C=C/C2C=CC=CC=2)=O)=CC=1.C1C=CC(/C=C/C(/C=C/C2C=CC=CC=2)=O)=CC=1.[Pd].[Pd].C(OCC)(=O)C.O1CCOCC1>[CH3:92][O:91][C:89](=[O:90])[CH2:88][CH2:87][S:86][C:2]1[CH:3]=[C:4]([O:28][C:29]2[CH:34]=[CH:33][CH:32]=[CH:31][CH:30]=2)[C:5]([NH:8][C:9]2[S:10][CH:11]=[C:12]([CH2:14][CH:15]3[CH2:20][CH2:19][N:18]([C:21]([O:23][C:24]([CH3:27])([CH3:26])[CH3:25])=[O:22])[CH2:17][CH2:16]3)[N:13]=2)=[N:6][CH:7]=1

Participants

8

Reactant 4

HCID 18050Methyl 3-mercaptopropionateHCID 81531DiisopropylethylamineHCID 6360441,1'-(9,9-Dimethyl-9H-xanthene-4,5-diyl)bis(1,1-diphenylphosphine)HCID 57742615Tert-butyl 4-((2-(5-bromo-3-phenoxypyridin-2-ylamino)thiazol-4-yl)methyl)piperidine-1-carboxylate

Product 1

HCID 57742831Tert-butyl 4-((2-(5-(3-methoxy-3-oxopropylthio)-3-phenoxypyridin-2-ylamino)thiazol-4-yl)methyl)piperidine-1-carboxylateYield 94.5%

Reagents, catalysts & solvents 3

HCID 9811564Bis(dibenzylideneacetone)palladiumCatalystHCID 8857Ethyl AcetateSolventHCID 312751,4-DioxaneSolvent

Conditions

Temperature
95 °C

Procedure

The atmosphere above a mixture of tert-butyl 4-((2-(5-bromo-3-phenoxypyridin-2-ylamino)thiazol-4-yl)methyl)piperidine-1-carboxylate (1.52 g, 2.79 mmol), N-ethyl-N-isopropylpropan-2-amine (0.971 mL, 5.57 mmol), 4,5-bis(diphenylphosphino)-9,9-dimethyl-9H-xanthene (0.161 g, 0.279 mmol), and dioxane (25 mL) was purged with nitrogen. Methyl 3-mercaptopropanoate (0.332 mL, 3.07 mmol) and Pd2dba3 (0.128 g, 0.139 mmol) were added, and the reaction was heated at 95° C. overnight. The reaction was cooled to ambient temperature and filtered through celite. The filtrate was concentrated and purified by MPLC (Biotage) eluting with 3:2 hexane:ethyl acetate to afford the title compound (1.54 g, 94.5% yield) as a tacky white solid: 1H NMR (CDCl3) δ 8.70 (s, 1H), 8.16 (s, 1H), 7.40 (t, 2H), 7.24 (t, 1H), 7.14 (s, 1H), 7.06 (d, 2H), 6.46 (s, 1H), 4.08 (m, 2H), 3.65 (s, 3H), 2.99 (t, 2H), 2.67 (m, 2H), 2.56 (d, 2H), 2.55 (t, 2H), 1.85 (m, 1H), 1.66 (m, 2H), 1.45 (s, 9H), 1.16 (m, 2H).

Workup

  1. customwas purged with nitrogen
  2. temperatureThe reaction was cooled to ambient temperature
  3. filtrationfiltered through celite
  4. concentrationThe filtrate was concentrated
  5. custompurified by MPLC (Biotage)
  6. washeluting with 3:2 hexane

Sources & evidence

ORD record
ord-d29eb315f536482c8b15af2d0ad588a5
Source dataset
uspto-grants-2011_09
Patent number
US08022223B2

Reaction notes

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