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Cesium carbonate → 5-Cyano-3-methyl-pyridine-2-carboxylic acid [6-((3R,6R)-5-amino-3,6-dimethyl-6-trifluoromethyl-3,6-dihydro-2H-[1,4]oxazin-3-yl)-5-fluoro-pyridin-2-yl]-amide

HRID 474066
Notes
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Reaction equation

HRID 474066 reaction equation
Br[C:2]1[N:7]=[C:6]([C@:8]2([CH3:20])[CH2:13][O:12][C@@:11]([CH3:18])([C:14]([F:17])([F:16])[F:15])[C:10]([NH2:19])=[N:9]2)[C:5]([F:21])=[CH:4][CH:3]=1.[C:22]([C:24]1[CH:25]=[C:26]([CH3:33])[C:27]([C:30]([NH2:32])=[O:31])=[N:28][CH:29]=1)#[N:23].CC1(C)C2C(=C(P(C3C=CC=CC=3)C3C=CC=CC=3)C=CC=2)OC2C(P(C3C=CC=CC=3)C3C=CC=CC=3)=CC=CC1=2.C(=O)([O-])[O-].[Cs+].[Cs+]>O1CCOCC1.O.CC(OC)(C)C.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]>[NH2:19][C:10]1[C@:11]([CH3:18])([C:14]([F:17])([F:16])[F:15])[O:12][CH2:13][C@:8]([C:6]2[N:7]=[C:2]([NH:32][C:30]([C:27]3[C:26]([CH3:33])=[CH:25][C:24]([C:22]#[N:23])=[CH:29][N:28]=3)=[O:31])[CH:3]=[CH:4][C:5]=2[F:21])([CH3:20])[N:9]=1
ParticipantsConditionsProcedureWorkupSources & evidenceReaction notes

Participants

9

Reactant 4

HCID 10796Cesium carbonateHCID 6360441,1'-(9,9-Dimethyl-9H-xanthene-4,5-diyl)bis(1,1-diphenylphosphine)HCID 666659355-Cyano-3-methyl-2-pyridinecarboxamideHCID 86668039(2R,5R)-5-(6-bromo-3-fluoro-pyridin-2-yl)-2,5-dimethyl-2-trifluoromethyl-5,6-dihydro-2H-[1,4]oxazin-3-ylamine

Product 1

HCID 70356221
5-Cyano-3-methyl-pyridine-2-carboxylic acid [6-((3R,6R)-5-amino-3,6-dimethyl-6-trifluoromethyl-3,6-dihydro-2H-[1,4]oxazin-3-yl)-5-fluoro-pyridin-2-yl]-amide
Yield 37%

Reagents, catalysts & solvents 4

HCID 9811564Bis(dibenzylideneacetone)palladiumCatalystHCID 962WaterSolventHCID 15413tert-Butyl methyl etherSolventHCID 312751,4-DioxaneSolvent

Conditions

Temperature
80 °C

Procedure

A mixture of (2R,5R)-5-(6-bromo-3-fluoro-pyridin-2-yl)-2,5-dimethyl-2-trifluoromethyl-5,6-dihydro-2H-[1,4]oxazin-3-ylamine (80 mg, 0.216 mmol), 5-cyano-3-methyl-pyridine-2-carboxylic acid amide (34.8 mg, 0.216 mmol, see Intermediates Amide 1), xantphos (11.26 mg, 0.019 mmol) and cesium carbonate (99 mg, 0.303 mmol) in dioxane (2 ml) was degassed for 5 minutes with argon. Pd2(dba)3 (5.94 mg, 6.48 μmol) was added, the microwave vial was sealed and stirred at 80° C. for 18 hours. The reaction mixture was diluted with water and TBME. The organic phase was washed with brine, dried over sodium sulfate, filtered and evaporated. 173 mg orange solid. Silica gel chromatography (applied on two 20×20 cm plate, 1 mm, dichloromethane:methanol 9:1, rechromatographed with dichloromethane:methanol 95:5 with double evolution of the plates) afforded the title compound: 15 mg and 21 mg. Combined amount: 36 mg (37% yield). TLC (dichloromethane/methanol 9:1) Rf=0.53; API ES+ MS 451. LCMS RtH4=0.87 min. (100%, ES+ 451), 1H-NMR (400 MHz, CDCl3): 10.80 (br s, 1H), 8.83 (br s, 1H), 8.41 (dd, 1H), 7.93 (br s, 1H), 7.55 (t, 1H), 5.8-4.6 (very broad, 2H), 4.23 (br s, 2H), 2.83 (s, 3H), 1.75 (s, 3H), 1.66 (s, 3H).

Workup

  1. customwas degassed for 5 minutes with argon
  2. customthe microwave vial was sealed
  3. washThe organic phase was washed with brine
  4. dry with materialdried over sodium sulfate
  5. filtrationfiltered
  6. customevaporated
  7. customrechromatographed with dichloromethane:methanol 95:5 with double evolution of the plates)

Sources & evidence

ORD record
ord-6ea0d7032c45491a9d3eb0563708a10d
Source dataset
uspto-grants-2014_01
DOI
10.6084/m9.figshare.5104873.v1
Patent number
US08637508B2

Reaction notes

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