Ethanolamine → (3S,3aR)-2-(3-chloro-4-cyanophenyl)-3-cyclopentyl-N-(2-hydroxyethyl)-3,3a,4,5-tetrahydro-2H-benzo[g]indazole-7-carboxamide

HRID 505753Notes

Reaction equation

HRID 505753 reaction equation
[Cl:1][C:2]1[CH:3]=[C:4]([N:10]2[C@@H:18]([CH:19]3[CH2:23][CH2:22][CH2:21][CH2:20]3)[C@@H:17]3[C:12]([C:13]4[CH:27]=[CH:26][C:25]([C:28]([OH:30])=O)=[CH:24][C:14]=4[CH2:15][CH2:16]3)=[N:11]2)[CH:5]=[CH:6][C:7]=1[C:8]#[N:9].ON1C2C=CC=CC=2N=N1.C(N(CC)CC)C.F[B-](F)(F)F.N1(OC(N(C)C)=[N+](C)C)C2C=CC=CC=2N=N1.[CH2:70]([CH2:72][NH2:73])[OH:71]>CN(C)C=O.C(#N)C.O>[Cl:1][C:2]1[CH:3]=[C:4]([N:10]2[C@@H:18]([CH:19]3[CH2:23][CH2:22][CH2:21][CH2:20]3)[C@@H:17]3[C:12]([C:13]4[CH:27]=[CH:26][C:25]([C:28]([NH:73][CH2:72][CH2:70][OH:71])=[O:30])=[CH:24][C:14]=4[CH2:15][CH2:16]3)=[N:11]2)[CH:5]=[CH:6][C:7]=1[C:8]#[N:9]

Participants

8

Reactant 5

HCID 700EthanolamineHCID 8471TriethylamineHCID 757711-HydroxybenzotriazoleHCID 2733207O-(Benzotriazol-1-yl)-N,N,N',N'-tetramethyluronium tetrafluoroborateHCID 46871935PF-03882845

Product 1

HCID 66722897(3S,3aR)-2-(3-chloro-4-cyanophenyl)-3-cyclopentyl-N-(2-hydroxyethyl)-3,3a,4,5-tetrahydro-2H-benzo[g]indazole-7-carboxamideYield 33%

Reagents, catalysts & solvents 2

HCID 6228DimethylformamideSolventHCID 18373917Acetonitrile--water (1/1)Solvent

Procedure

To a solution of (3S,3aR)-2-(3-chloro-4-cyanophenyl)-3-cyclopentyl-3,3a,4,5-tetrahydro-2H-benzo[g]indazole-7-carboxylic acid, Example 15 (90 mg, 0.20 mmol) in N,N-dimethylformamide (1 mL) was added 1-hydroxybenzotriazole (43 mg, 0.32 mmol), triethylamine (0.06 mL, 0.40 mmol) and O-benzotriazol-1-yl-N,N,N′,N′-tetramethyluronium tetrafluoroborate (103 mg, 0.32 mmol). The solution was stirred for twenty-five minutes followed by addition of ethanolamine (0.02 mL, 0.32 mmol). The solution was stirred for twenty hours at ambient temperature. The reaction was quenched with water and the resulting yellow solid was collected by vacuum filtration. Chromatography (reverse phase, acetonitrile/water) provided (3S,3aR)-2-(3-chloro-4-cyanophenyl)-3-cyclopentyl-N-(2-hydroxyethyl)-3,3a,4,5-tetrahydro-2H-benzo[g]indazole-7-carboxamide (yellow solid, 30 mg, 33% yield). LC/MS on 4.6×50 mm C-18 column, tR=6.00 minutes (10 to 90% acetonitrile/water over 6 minutes at 2 mL/minute with detection 254 nm, at 50° C.); ES-MS m/z 463 (M+H); HRMS Calculated for C26H27ClN4O2: 463.1895 (M+H)+. Found: 463.1875; 1H NMR (400 MHz, DMSO-d6) δ ppm 1.10-1.50 (m, 6H), 1.66-1.84 (m, 2H), 2.17-2.25 (m, 1H), 2.87-2.93 (m, 1H), 2.99-3.06 (m, 1H), 3.26-3.34 (m, 2H), 3.48 (t, J=6.18 Hz, 2H), 3.53-3.63 (m, 2H), 4.92 (dd, J=9.13, 6.18 Hz, 1H), 7.17 (dd, J=8.46, 1.75 Hz, 1H), 7.38 (d, J=2.15 Hz, 1H), 7.65 (d, J=8.86 Hz, 1H), 7.73 (d, J=8.59 Hz, 1H), 7.76 (s, 1H), 8.03 (d, J=8.06 Hz, 1H), 8.46 (t, J=6.31 Hz, 1H).

Workup

  1. stirringThe solution was stirred for twenty hours at ambient temperature
  2. customThe reaction was quenched with water
  3. filtrationthe resulting yellow solid was collected by vacuum filtration

Sources & evidence

ORD record
ord-1c4855b0c0064751af85b6dd33042ee9
Source dataset
uspto-grants-2010_08
Patent number
US07781428B2

Reaction notes

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