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Diisopropylethylamine → 3-[5-Bromo-3-[[1-methyl-1-[2-(phenylmethoxy)phenyl]ethyl]amino]-2-oxo-1(2H)-pyrazinyl]-5-fluoro-4-methyl-benzoic acid, ethyl ester

HRID 1697323
Notes
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Reaction equation

HRID 1697323 reaction equation
Br[C:2]1[C:3](=[O:22])[N:4]([C:9]2[CH:10]=[C:11]([CH:17]=[C:18]([F:21])[C:19]=2[CH3:20])[C:12]([O:14][CH2:15][CH3:16])=[O:13])[CH:5]=[C:6]([Br:8])[N:7]=1.[CH3:23][C:24]([CH3:40])([C:26]1[CH:31]=[CH:30][CH:29]=[CH:28][C:27]=1[O:32][CH2:33][C:34]1[CH:39]=[CH:38][CH:37]=[CH:36][CH:35]=1)[NH2:25].C(N(C(C)C)C(C)C)C>O1CCOCC1.O>[Br:8][C:6]1[N:7]=[C:2]([NH:25][C:24]([CH3:40])([C:26]2[CH:31]=[CH:30][CH:29]=[CH:28][C:27]=2[O:32][CH2:33][C:34]2[CH:39]=[CH:38][CH:37]=[CH:36][CH:35]=2)[CH3:23])[C:3](=[O:22])[N:4]([C:9]2[CH:10]=[C:11]([CH:17]=[C:18]([F:21])[C:19]=2[CH3:20])[C:12]([O:14][CH2:15][CH3:16])=[O:13])[CH:5]=1
ParticipantsConditionsProcedureWorkupSources & evidenceReaction notes

Participants

6

Reactant 3

HCID 81531DiisopropylethylamineHCID 666888502-(2-(Benzyloxy)phenyl)propan-2-amineHCID 866632473-(3,5-Dibromo-2-oxo-1(2H)-pyrazinyl)-5-fluoro-4-methyl-benzoic acid, ethyl ester

Product 1

HCID 866632463-[5-Bromo-3-[[1-methyl-1-[2-(phenylmethoxy)phenyl]ethyl]amino]-2-oxo-1(2H)-pyrazinyl]-5-fluoro-4-methyl-benzoic acid, ethyl esterYield 99.9%

Reagents, catalysts & solvents 2

HCID 962WaterSolvent
HCID 312751,4-DioxaneSolvent

Conditions

Temperature
100 °C

Procedure

3-(3,5-Dibromo-2-oxo-1(2H)-pyrazinyl)-5-fluoro-4-methyl-benzoic acid, ethyl ester (Example 169d, 1.137 g, 2.62 mmol) was dissolved in dioxane (10 mL). α,α-Dimethyl-2-(phenylmethoxy)-benzenemethanamine (Example 134a, 0.63 g) and N-ethyldiisopropylamine (0.67 mL, 3.93 mmol) were added under nitrogen and the resulting solution was stirred at 100° C. for 10 h. The reaction mixture was diluted with water (50 mL), and extracted with ethyl acetate (100 mL×2). The combined organics were dried (MgSO4), filtered and evaporated to afford the crude product. This was purified by (SiO2 chromatography eluting with dichloromethane) to afford the subtitle product (1.55 g).

Workup

  1. extractionextracted with ethyl acetate (100 mL×2)
  2. dry with materialThe combined organics were dried (MgSO4)
  3. filtrationfiltered
  4. customevaporated
  5. customto afford the crude product
  6. customThis was purified by (SiO2 chromatography eluting with dichloromethane)

Sources & evidence

ORD record
ord-ac23acebb66b4bf4aeeb084ec4297108
Source dataset
uspto-grants-2012_04
DOI
10.6084/m9.figshare.5104873.v1
Patent number
US08163905B2

Reaction notes

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On this pageParticipantsConditionsProcedureWorkupSources & evidenceReaction notes