Ethanolamine → HCID 56834056, compound

HRID 2367801Notes

Reaction equation

HRID 2367801 reaction equation
FC(F)(F)C(O)=O.[C:8]1([C:14]2[CH:19]=[C:18]([CH:20]3[CH2:25][CH2:24][NH:23][CH2:22][CH2:21]3)[CH:17]=[CH:16][C:15]=2[NH:26][C:27]([C:29]2[N:30]([CH2:36][O:37][CH2:38][CH2:39][Si:40]([CH3:43])([CH3:42])[CH3:41])[CH:31]=[C:32]([C:34]#[N:35])[N:33]=2)=[O:28])[CH2:13][CH2:12][CH2:11][CH2:10][CH:9]=1.CCN(C(C)C)C(C)C.ClC(Cl)(O[C:57](=[O:63])OC(Cl)(Cl)Cl)Cl.[NH2:65][CH2:66][CH2:67][OH:68]>C(Cl)Cl.C1COCC1.CCOC(C)=O>[OH:68][CH2:67][CH2:66][NH:65][C:57]([N:23]1[CH2:24][CH2:25][CH:20]([C:18]2[CH:17]=[CH:16][C:15]([NH:26][C:27]([C:29]3[N:30]([CH2:36][O:37][CH2:38][CH2:39][Si:40]([CH3:43])([CH3:42])[CH3:41])[CH:31]=[C:32]([C:34]#[N:35])[N:33]=3)=[O:28])=[C:14]([C:8]3[CH2:13][CH2:12][CH2:11][CH2:10][CH:9]=3)[CH:19]=2)[CH2:21][CH2:22]1)=[O:63]

Participants

8

Reactant 4

HCID 700EthanolamineHCID 81531DiisopropylethylamineHCID 94429TriphosgeneHCID 56833460HCID 56833460, compound

Product 1

HCID 56834056HCID 56834056, compoundYield 83%

Reagents, catalysts & solvents 3

HCID 6344DichloromethaneSolvent2×HCID 8028TetrahydrofuranSolventHCID 8857Ethyl AcetateSolvent

Conditions

Temperature
-78 °C

Procedure

A solution of 4-cyano-1-(2-trimethylsilanyl-ethoxymethyl)-1H-imidazole-2-carboxylic acid (2-cyclohex-1-enyl-4-piperidin-4-yl-phenyl)-amide trifluoroacetic acid salt (as prepared in the previous step, 116 mg, 0.192 mmol) and DIEA (134 μL, 0.770 mmol) in 4 mL of DCM was added slowly to solution of triphosgene (23 mg, 0.0768 mmol) in 4 mL of DCM at −78° C. under Ar. The mixture was stirred at −78° C. for 15 min, warmed to RT and stirred for 15 min and cooled to −78° C. again. A suspension of 2-amino-ethanol (350 μL, 5.77 mmol) in 4 mL of THF was added and the resulting mixture was warmed to RT and stirred for 20 h under Ar. Treated with 100 mL of EtOAc, the mixture was washed with H2O (3×20 mL), brine (20 mL) and dried (Na2SO4). Removal of the solvent in vacuo followed by flash chromatography of the residue on silica gel (10% EtOAc/DCM then 5% MeOH/DCM) gave 95 mg (83%) of the title compound as a colorless oil. 1H-NMR (CDCl3; 400 MHz): δ 9.68 (s, 1H), 8.25 (d, 1H, J=8.4 Hz), 7.77 (s, 1H), 7.12 (dd, 1H, J=8.4, 2.2 Hz), 7.01 (d, 1H, J=2.2 Hz), 5.94 (s, 2H), 5.83 (m, 1H), 4.96 (t, 1H, J=5.6 Hz), 4.11 (d, 2H, J=13.3 Hz), 3.75 (ddd, 2H, J=4.4 Hz), 3.66 (t, 2H, J=8.3 Hz), 3.44 (ddd, 2H, J=5.0 Hz), 3.36 (t, 1H, J=4.6 Hz), 2.91 (ddd, 2H, J=13.0, 2.2 Hz), 2.66 (dddd, 1H, J=12.2, 12.2, 3.3, 3.3 Hz), 2.18-2.33 (m, 4H), 1.75-1.91 (m, 6H), 1.67 (dddd, 2H, J=12.9, 12.9, 12.9, 4.0 Hz), 0.97 (t, 2H, J=8.3 Hz), 0.00 (s, 9H). Mass spectrum (ESI, m/z): Calcd. for C31H44N6O4Si, 593.3 (M+H). found 593.1.

Workup

  1. temperaturewarmed to RT
  2. stirringstirred for 15 min
  3. temperaturecooled to −78° C. again
  4. additionwas added
  5. temperaturethe resulting mixture was warmed to RT
  6. stirringstirred for 20 h under Ar
  7. washthe mixture was washed with H2O (3×20 mL), brine (20 mL)
  8. dry with materialdried (Na2SO4)
  9. customRemoval of the solvent in vacuo

Sources & evidence

ORD record
ord-a8b9d509016e4fac93a20919300c72ff
Source dataset
uspto-grants-2014_04
Patent number
US08697716B2

Reaction notes

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