Acetic Acid → HCID 58529543, compound

HRID 1972839Notes

Reaction equation

HRID 1972839 reaction equation
[CH2:1]([N:8]1[CH:16]=[C:15]2[C:10]([CH:11]=[C:12]([C:17]3[CH:18]=[C:19]([CH:27]4[CH2:31][CH2:30][NH:29][CH2:28]4)[N:20]4[C:25]=3[C:24]([NH2:26])=[N:23][CH:22]=[N:21]4)[CH:13]=[CH:14]2)=[N:9]1)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.C(O)(=O)C.C(O[C:39]1(O[Si](C)(C)C)[CH2:41][CH2:40]1)C.C([BH3-])#N.[Na+]>CO>[CH2:1]([N:8]1[CH:16]=[C:15]2[C:10]([CH:11]=[C:12]([C:17]3[CH:18]=[C:19]([CH:27]4[CH2:31][CH2:30][N:29]([CH:39]5[CH2:41][CH2:40]5)[CH2:28]4)[N:20]4[C:25]=3[C:24]([NH2:26])=[N:23][CH:22]=[N:21]4)[CH:13]=[CH:14]2)=[N:9]1)[C:2]1[CH:3]=[CH:4][CH:5]=[CH:6][CH:7]=1

Participants

6

Reactant 4

HCID 176Acetic AcidHCID 2734686(1-Ethoxycyclopropoxy)trimethylsilaneHCID 5003444Sodium cyanoborohydrideHCID 58529326HCID 58529326, compound

Product 1

HCID 58529543HCID 58529543, compoundYield 29.2%

Reagents, catalysts & solvents 1

HCID 887MethanolSolvent

Procedure

(5-(2-benzyl-2H-indazol-6-yl)-7-pyrrolidin-3-ylpyrrolo[2,1-f][1,2,4]triazin-4-amine (100 mg, 0.244 mmol) was dissolved in methanol (3.5 mL). Acetic acid (140 uL, 2.44 mmol) was added followed by a small scoop of activated molecular sieves. [(1-ethoxycyclopropyl)oxy](trimethyl)silane (255 mg, 1.47 mmol) was added to the flask via syringe. Solid sodium cyanoborohydride was added (61 mg, 0.977 mmol) to the reaction which was then heated under nitrogen overnight. The mixture was partitioned between ethyl acetate (100 mL) and sodium bicarbonate (50 mL). The aqueous layer was extracted with ethyl acetate (20 mL). The combined organic layer was washed with brine and then dried with sodium sulfate. The product was purified using column chromatography, eluent 2-3% (7N NH3 in Methanol)/dichloromethane to afford 32 mg (29%) of desired product. 1H NMR (300 MHz, dichloromethane-d2) δ 8.04 (s, 1 H), 7.89 (s, 1 H), 7.78-7.73 (m, 3 H), 7.60-7.40 (m, 4 H), 7.25 (d, 1 H), 6.63 (s, 1H), 5.62 (s, 2 H), 5.52 (bs, 2 H), 3.90 (m, 1H), 3.40 (m, 1H), 2.80 (m, 3 H), 2.40 (m, 1 H), 1.95 (m, 1 H), 1.75 (m, 1 H), 1.40-0.90 (m, 3 H); ES-MS m/z 450.2 [M+H]+, HPLC RT (min) 2.17.

Workup

  1. customto the reaction which
  2. temperaturewas then heated under nitrogen overnight
  3. customThe mixture was partitioned between ethyl acetate (100 mL) and sodium bicarbonate (50 mL)
  4. extractionThe aqueous layer was extracted with ethyl acetate (20 mL)
  5. washThe combined organic layer was washed with brine
  6. dry with materialdried with sodium sulfate
  7. customThe product was purified

Sources & evidence

ORD record
ord-5af98a904b7d43df91e093cd9e54f9a1
Source dataset
uspto-grants-2013_04
Patent number
US08431695B2

Reaction notes

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