Diisopropylethylamine → (S)-N-cyclopropyl-3-methyl-4-(4-((6-oxo-6,6a,7,8,9,10-hexahydro-5H-dipyrido[1,2-a:3',2'-e]pyrazin-3-yl)methyl)piperazin-1-yl)benzamide

HRID 1645010Notes

Reaction equation

HRID 1645010 reaction equation
O[CH2:2][C:3]1[CH:12]=[N:11][C:10]2[N:9]3[CH2:13][CH2:14][CH2:15][CH2:16][C@H:8]3[C:7](=[O:17])[NH:6][C:5]=2[CH:4]=1.Cl.Cl.[CH:20]1([NH:23][C:24](=[O:38])[C:25]2[CH:30]=[CH:29][C:28]([N:31]3[CH2:36][CH2:35][NH:34][CH2:33][CH2:32]3)=[C:27]([CH3:37])[CH:26]=2)[CH2:22][CH2:21]1.[I-].C(C[P+](C)(C)C)#N.C(N(CC)C(C)C)(C)C>C(#N)CC>[CH:20]1([NH:23][C:24](=[O:38])[C:25]2[CH:30]=[CH:29][C:28]([N:31]3[CH2:32][CH2:33][N:34]([CH2:2][C:3]4[CH:12]=[N:11][C:10]5[N:9]6[CH2:13][CH2:14][CH2:15][CH2:16][C@H:8]6[C:7](=[O:17])[NH:6][C:5]=5[CH:4]=4)[CH2:35][CH2:36]3)=[C:27]([CH3:37])[CH:26]=2)[CH2:22][CH2:21]1

Participants

6

Reactant 4

HCID 81531DiisopropylethylamineHCID 10514344(Cyanomethyl)trimethylphosphanium iodideHCID 58324368(S)-3-(hydroxymethyl)-7,8,9,10-tetrahydro-5H-dipyrido[1,2-a:3',2'-e]pyrazin-6(6aH)-oneHCID 66775049N-cyclopropyl-3-methyl-4-(piperazin-1-yl)benzamide dihydrochloride

Product 1

HCID 46864565(S)-N-cyclopropyl-3-methyl-4-(4-((6-oxo-6,6a,7,8,9,10-hexahydro-5H-dipyrido[1,2-a:3',2'-e]pyrazin-3-yl)methyl)piperazin-1-yl)benzamideYield 24.92%

Reagents, catalysts & solvents 1

HCID 7854PropionitrileSolvent

Conditions

Temperature
90 °C

Procedure

(S)-3-(hydroxymethyl)-7,8,9,10-tetrahydro-5H-dipyrido[1,2-a:3′,2′-e]pyrazin-6(6aH)-one (100 mg, 0.429 mmol), N-cyclopropyl-3-methyl-4-(piperazin-1-yl)benzamide dihydrochloride (143 mg, 0.430 mmol), (cyanomethyl)trimethylphosphonium iodide (167 mg, 0.686 mmol) and N,N-diisopropylethylamine (374 μl, 2.143 mmol) were suspended in Propiononitrile (Volume: 1287 μl) and heated in a closed vial at 90° C. for 4 h. The reaction mixture became a dark brown solution. It was cooled to room temperature and purified using HPLC (NH4HCO3 buffered, 20-70% ACN in water). The fractions were concentrated in vacuo and the resulting solid was recrystallized from MeCN (20 mL), filtered off, washed with water (2 mL) and dried in vacuum to afford (S)—N-cyclopropyl-3-methyl-4-(4-((6-oxo-6,6a,7,8,9,10-hexahydro-5H-dipyrido[1,2-a:3′,2′-e]pyrazin-3-yl)methyl)piperazin-1-yl)benzamide (50.7 mg, 0.107 mmol, 24.92% yield) as a light brown solid. 1H NMR (400 MHz, DMSO-d6) δ ppm 0.49-0.59 (m, 2H) 0.60-0.71 (m, 2H) 1.33-1.57 (m, 3H) 1.64 (d, J=12.88 Hz, 1H) 1.85 (d, J=12.63 Hz, 1H) 2.04 (d, J=12.88 Hz, 1H) 2.25 (s, 3H) 2.42-2.56 (m, 4H) 2.60 (td, J=12.63, 2.78 Hz, 1H) 2.76-2.93 (m, 5H) 3.38 (s, 2H) 3.84 (dd, J=11.37, 2.78 Hz, 1H) 4.50 (d, J=13.14 Hz, 1H) 6.98 (d, J=2.02 Hz, 1H) 7.00 (d, J=8.34 Hz, 1H) 7.56-7.63 (m, 2H) 7.66 (d, J=2.02 Hz, 1H) 8.22 (d, J=4.29 Hz, 1H) 10.49 (s, 1H); [M+H] calc'd for C27H34N6O2, 475; found, 475.

Workup

  1. temperatureIt was cooled to room temperature
  2. custompurified
  3. concentrationThe fractions were concentrated in vacuo
  4. customthe resulting solid was recrystallized from MeCN (20 mL)
  5. filtrationfiltered off
  6. washwashed with water (2 mL)
  7. customdried in vacuum

Sources & evidence

ORD record
ord-0b2a7be0b1fa45ecb9926fca558031e4
Source dataset
uspto-grants-2012_02
Patent number
US08124606B2

Reaction notes

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