Acetic Acid → HCID 68283732, compound

HRID 2408675Notes

Reaction equation

HRID 2408675 reaction equation
[CH3:1][N:2]1[CH2:24][CH2:23][C:5]2[N:6]([CH2:14][CH:15]([NH2:22])[C:16]3[CH:21]=[CH:20][N:19]=[CH:18][CH:17]=3)[C:7]3[CH:8]=[CH:9][C:10]([CH3:13])=[CH:11][C:12]=3[C:4]=2[CH2:3]1.[CH3:25][C:26]([CH3:28])=O.C(O)(=O)C.C([BH3-])#N.[Na+]>C(Cl)Cl>[CH3:1][N:2]1[CH2:24][CH2:23][C:5]2[N:6]([CH2:14][CH:15]([NH:22][CH:26]([CH3:28])[CH3:25])[C:16]3[CH:21]=[CH:20][N:19]=[CH:18][CH:17]=3)[C:7]3[CH:8]=[CH:9][C:10]([CH3:13])=[CH:11][C:12]=3[C:4]=2[CH2:3]1

Participants

6

Reactant 4

HCID 176Acetic AcidHCID 180AcetoneHCID 5003444Sodium cyanoborohydrideHCID 68284085HCID 68284085, compound

Product 1

HCID 68283732HCID 68283732, compoundYield 53.4%

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent2×

Procedure

2-(2,8-Dimethyl-1,2,3,4-tetrahydro-pyrido[4,3-b]indol-5-yl)-1-pyridin-4-yl-ethylamine (200 mg, 0.62 mmol) was dissolved in 15 mL DCM, acetone (108 mg, 1.87 mmol), acetic acid (0.5 mL) was added and the reaction mixture was stirred at RT overnight. Sodiumcyanoborohydride (117 mg, 1.87 mmol) was added and stirred at for 1 h. The reaction mixture was diluted with DCM (300 mL) and washed with saturated bicarbonate solution (200 mL). The organic layer was dried over anhydrous sodium sulfate and concentrated to obtain the crude product, which was purified by reverse phase chromatography to obtain 120 mg of [2-(2,8-dimethyl-1,2,3,4-tetrahydro-pyrido[4,3-b]indol-5-yl)-1-pyridin-4-yl-ethyl]-isopropyl-amine as the TFA salt. 1H NMR (CD3OD, TFA salt): δ (ppm): 8.52 (m, 2H), 7.42 b(s, 2H), 7.30 b(s, 1H), 7.22 (s, 1H), 7.02 (m, 1H), 4.8 (m, 1H), 4.58 (m, 2H), 4.23 (t, 1H), 3.72 (m, 1H), 3.4 (m, 3H), 3.13 (m, 2H), 2.99 (d, 3H), 2.39 (s, 3H), 1.43 (d, 3H), 1.34 (d, 3H). Chiral HPLC separates the racemate into enantiomers II-10a-b.

Workup

  1. stirringstirred at for 1 h
  2. washwashed with saturated bicarbonate solution (200 mL)
  3. dry with materialThe organic layer was dried over anhydrous sodium sulfate
  4. concentrationconcentrated
  5. customto obtain the crude product, which
  6. customwas purified by reverse phase chromatography

Sources & evidence

ORD record
ord-f3a68b29c6e94eaa9de8687712543d65
Source dataset
uspto-grants-2014_08
Patent number
US08815843B2

Reaction notes

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