Nitrogen → tert-Butyl 4-(4-((tert-butoxycarbonyl)amino)-3-fluorophenyl)-5,6-dihydropyridine-1(2H)-carboxylate

HRID 705779Notes

Reaction equation

HRID 705779 reaction equation
FC(F)(F)S(O[C:7]1[CH2:12][CH2:11][N:10]([C:13]([O:15][C:16]([CH3:19])([CH3:18])[CH3:17])=[O:14])[CH2:9][CH:8]=1)(=O)=O.[C:22]([O:26][C:27](=[O:45])[NH:28][C:29]1[CH:34]=[CH:33][C:32](B2OC(C)(C)C(C)(C)O2)=[CH:31][C:30]=1[F:44])([CH3:25])([CH3:24])[CH3:23].N#N.C(=O)([O-])[O-].[Na+].[Na+]>Cl[Pd](Cl)([P](C1C=CC=CC=1)(C1C=CC=CC=1)C1C=CC=CC=1)[P](C1C=CC=CC=1)(C1C=CC=CC=1)C1C=CC=CC=1.O1CCOCC1>[C:22]([O:26][C:27]([NH:28][C:29]1[CH:34]=[CH:33][C:32]([C:7]2[CH2:12][CH2:11][N:10]([C:13]([O:15][C:16]([CH3:17])([CH3:18])[CH3:19])=[O:14])[CH2:9][CH:8]=2)=[CH:31][C:30]=1[F:44])=[O:45])([CH3:25])([CH3:23])[CH3:24]

Participants

7

Reactant 4

HCID 947NitrogenHCID 10340Sodium CarbonateHCID 10991161Tert-butyl 4-(trifluoromethanesulfonyloxy)-1,2,3,6-tetrahydropyridine-1-carboxylateHCID 22346775Tert-butyl 2-fluoro-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-YL)phenylcarbamate

Product 1

HCID 68283496tert-Butyl 4-(4-((tert-butoxycarbonyl)amino)-3-fluorophenyl)-5,6-dihydropyridine-1(2H)-carboxylate

Reagents, catalysts & solvents 2

HCID 178418476HCID 178418476, compoundCatalystHCID 312751,4-DioxaneSolvent

Procedure

To a mixture of tert-butyl 4-(((trifluoromethyl)sulfonyl)oxy)-5,6-dihydropyridine-1(2H)-carboxylate (I16) (0.504 g, 1.52 mmol), tert-butyl(2-fluoro-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl)carbamate (I62) (0.496 g, 1.47 mmol), and PdCl2(PPh3)2 (0.055 g, 0.078 mmol) under a N2 atmosphere was added dioxane (15 mL) and the mixture was bubbled with N2 for 5 minutes before addition of 3.0 M aqueous sodium carbonate (1.5 mL, 4.5 mmol). The reaction was heated at reflux for 6 hours then concentrated under reduced pressure. The residue was chromatographed on silica gel (0-25% EtOAc/petroleum benzine 40-60° C.) to give the title compound (I57) (0.409 g, 71%); 1H NMR (400 MHz, CDCl3) δ 7.12 (m, 3H), 6.09 (s, 1H), 4.08 (m, J=2.8 Hz, 2H), 3.63 (dd, J=5.6, 5.6 Hz, 2H), 2.49 (m, 2H), 1.42 (s, 18H).

Workup

  1. temperatureThe reaction was heated
  2. temperatureat reflux for 6 hours
  3. concentrationthen concentrated under reduced pressure
  4. customThe residue was chromatographed on silica gel (0-25% EtOAc/petroleum benzine 40-60° C.)

Sources & evidence

ORD record
ord-a1308fa1f1704bc78bc6d095ff79b938
Source dataset
uspto-grants-2015_11
Patent number
US09174946B2

Reaction notes

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