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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 2070742
Notes
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Reaction equation

HRID 2070742 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-504ff8dc00bf4303bf214f79a3b3b56c
Source dataset
uspto-grants-2012_10
DOI
10.6084/m9.figshare.5104873.v1
Patent number
US08299246B2

Reaction notes

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On this pageParticipantsConditionsProcedureWorkupSources & evidenceReaction notes