Potassium Carbonate → (S)-ethyl 2-tert-butoxy-2-(7-(4-chlorophenyl)-5-methyl-2-(2-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]oxazin-7-yl)pyridin-4-yl)benzo[d]thiazol-6-yl)acetate

HRID 879362Notes

Reaction equation

HRID 879362 reaction equation
[C:1]([O:5][C@@H:6]([C:12]1[C:27]([CH3:28])=[CH:26][C:15]2[N:16]=[C:17]([C:19]3[CH:24]=[CH:23][N:22]=[C:21](Cl)[CH:20]=3)[S:18][C:14]=2[C:13]=1[C:29]1[CH:34]=[CH:33][C:32]([Cl:35])=[CH:31][CH:30]=1)[C:7]([O:9][CH2:10][CH3:11])=[O:8])([CH3:4])([CH3:3])[CH3:2].CC1(C)C(C)(C)OB([C:44]2[CH:53]=[N:52][C:51]3[NH:50][C:49](=[O:54])[CH2:48][O:47][C:46]=3[CH:45]=2)O1.C([O-])([O-])=O.[K+].[K+]>O1CCOCC1.C1C=CC([P]([Pd]([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)[P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)=CC=1>[C:1]([O:5][C@@H:6]([C:12]1[C:27]([CH3:28])=[CH:26][C:15]2[N:16]=[C:17]([C:19]3[CH:24]=[CH:23][N:22]=[C:21]([C:44]4[CH:53]=[N:52][C:51]5[NH:50][C:49](=[O:54])[CH2:48][O:47][C:46]=5[CH:45]=4)[CH:20]=3)[S:18][C:14]=2[C:13]=1[C:29]1[CH:34]=[CH:33][C:32]([Cl:35])=[CH:31][CH:30]=1)[C:7]([O:9][CH2:10][CH3:11])=[O:8])([CH3:2])([CH3:3])[CH3:4]

Participants

6

Reactant 3

HCID 11430Potassium CarbonateHCID 86700142(S)-ethyl 2-tert-butoxy-2-(7-(4-chlorophenyl)-2-(2-chloropyridin-4-yl)-5-methylbenzo[d]thiazol-6-yl)acetateHCID 867001687-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-2H-pyrido[3,2-b][1,4]oxazin-3(4H)-one

Product 1

HCID 86700167(S)-ethyl 2-tert-butoxy-2-(7-(4-chlorophenyl)-5-methyl-2-(2-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]oxazin-7-yl)pyridin-4-yl)benzo[d]thiazol-6-yl)acetate

Reagents, catalysts & solvents 2

HCID 178418397HCID 178418397, compoundCatalystHCID 312751,4-DioxaneSolvent

Conditions

Temperature
100 °C

Procedure

To a solution of (S)-ethyl 2-tert-butoxy-2-(7-(4-chlorophenyl)-2-(2-chloropyridin-4-yl)-5-methylbenzo[d]thiazol-6-yl)acetate (32.0 mg, 0.061 mmol) and 7-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-2H-pyrido[3,2-b][1,4]oxazin-3(4H)-one (20.0 mg, 0.073 mmol) in dioxane (0.5 mL) was added Pd(PPh3)4 (3.5 mg, 0.003 mmol) and 2N K2CO3 (127 μL, 0.255 mmol). The reaction was degassed for 5 minutes with N2 and then heated at 100° C. for 10 h. After cooling, the reaction mixture was diluted with EtOAc, extracted with H2O, brine, dried over Na2SO4, filtered and concentrated and purified by flash column chromatography (silica gel, 0 to 100% ethyl acetate/hexanes) to give the desired product. LCMS-ESI+ (m/z): [M+H]+ calcd for C34H32ClN4O5S: 643.2; found: 643.3.

Workup

  1. customThe reaction was degassed for 5 minutes with N2
  2. temperatureAfter cooling
  3. additionthe reaction mixture was diluted with EtOAc
  4. extractionextracted with H2O, brine
  5. dry with materialdried over Na2SO4
  6. filtrationfiltered
  7. concentrationconcentrated
  8. custompurified by flash column chromatography (silica gel, 0 to 100% ethyl acetate/hexanes)

Sources & evidence

ORD record
ord-95d4044f4d164e3ea255ce9b71f93534
Source dataset
uspto-grants-2015_03
Patent number
US08987250B2

Reaction notes

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