Triethylamine → HCID 178467172, compound

HRID 2066922Notes

Reaction equation

HRID 2066922 reaction equation
Br[C:2]1[N:7]=[C:6]2[N:8]([C@H:12]([C:14]3[CH:19]=[CH:18][CH:17]=[CH:16][CH:15]=3)[CH3:13])[C:9]([OH:11])=[N:10][C:5]2=[N:4][CH:3]=1.C(N(CC)CC)C.C([Sn](CCCC)(CCCC)[C:32]([O:34]CC)=[CH2:33])CCC>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.O1CCOCC1>[OH:11][C:9]1[N:8]([C@H:12]([C:14]2[CH:19]=[CH:18][CH:17]=[CH:16][CH:15]=2)[CH3:13])[C:6]2=[N:7][C:2]([C:32](=[O:34])[CH3:33])=[CH:3][N:4]=[C:5]2[N:10]=1

Participants

6

Reactant 3

HCID 8471TriethylamineHCID 619414Stannane, tributyl(1-ethoxyethenyl)-HCID 178461678HCID 178461678, compound

Product 1

HCID 178467172HCID 178467172, compoundYield 33%

Reagents, catalysts & solvents 2

HCID 178418397HCID 178418397, compoundCatalystHCID 312751,4-DioxaneSolvent

Conditions

Temperature
80 °C

Procedure

An oven-dried scintillation vial equipped with a stirbar was charged with (S)-6-bromo-1-(1-phenylethyl)-1H-imidazo[4,5-b]pyrazin-2-ol (1.0 equiv), and (Ph3P)4Pd (0.07 equiv). The bottle was covered with a sheet of Parafilm and purged with nitrogen for 5 min, and anhydous dioxane (13 volume equivalents), triethylamine (3.0 equiv), and tributyl(1-ethoxyvinyl)stannane (1.5 equiv) were added by syringe. The resulting mixture was heated to 80° C. overnight. The reaction was quenched with 1 N KHSO4 and stirred for 30 min. The mixture was then diluted with EtOAc, washed twice with NaHCO3 and once with brine. The organic layer was dried over sodium sulfate, filtered, and concentrated in vacuo. Flash chromatography (Biotage MPLC 10%-66% EtOAc/Hexanes) provided the title compound (33%) as a white solid. LCMS m/z (APCI)=283.1 (M+H).

Workup

  1. customAn oven-dried scintillation vial equipped with a stirbar
  2. custompurged with nitrogen for 5 min
  3. customThe reaction was quenched with 1 N KHSO4
  4. additionThe mixture was then diluted with EtOAc
  5. washwashed twice with NaHCO3 and once with brine
  6. dry with materialThe organic layer was dried over sodium sulfate
  7. filtrationfiltered
  8. concentrationconcentrated in vacuo

Sources & evidence

ORD record
ord-dfc42833827f4a0c9df129c61968c958
Source dataset
uspto-grants-2012_10
Patent number
US08293761B2

Reaction notes

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