Triethylamine → HCID 59013946, compound

HRID 907555Notes

Reaction equation

HRID 907555 reaction equation
C(O[C:6]([N:8]1[CH2:13][CH2:12][N:11]([C:14]2[C:19]([Cl:20])=[N:18][CH:17]=[CH:16][N:15]=2)[CH2:10][CH2:9]1)=[O:7])(C)(C)C.Cl.O1CCOCC1.C(N(CC)CC)C.[N:35]([C:38]1[CH:43]=[C:42]([C:44]([F:47])([F:46])[F:45])[CH:41]=[C:40]([C:48]([F:51])([F:50])[F:49])[CH:39]=1)=C=O>CCOC(C)=O.ClCCl>[F:45][C:44]([F:46])([F:47])[C:42]1[CH:43]=[C:38]([NH:35][C:6]([N:8]2[CH2:9][CH2:10][N:11]([C:14]3[C:19]([Cl:20])=[N:18][CH:17]=[CH:16][N:15]=3)[CH2:12][CH2:13]2)=[O:7])[CH:39]=[C:40]([C:48]([F:49])([F:51])[F:50])[CH:41]=1

Participants

7

Reactant 4

HCID 8471TriethylamineHCID 27333143,5-Bis(trifluoromethyl)phenyl isocyanateHCID 11150691Tert-butyl 4-(3-chloropyrazin-2-yl)piperazine-1-carboxylateHCID 204431481,4-Dioxane hydrochloride

Product 1

HCID 59013946HCID 59013946, compoundYield 100%

Reagents, catalysts & solvents 2

HCID 6344DichloromethaneSolventHCID 8857Ethyl AcetateSolvent

Procedure

To a solution of 3′-chloro-2,3,5,6-tetrahydro-[1,2′]bipyrazinyl-4-carboxylic acid tert-butyl ester (3.7 g, 12.4 mmol, prepared in Example 5a) and dichloromethane (20 mL) was added anhydrous 4M HCl/Dioxane (20 mL). The solution was stirred for 1 h until complete de-protection was evident by LCMS. The solution was concentrated in vacuo, which was then re-dissolved in dichloromethane (50 mL). Triethylamine (3.78 g, 37.4 mmol) was added and the solution was cooled to 0° C. before dropwise addition of 1-isocyanato-3,5-bis-trifluoromethyl-benzene (3.70 g, 14.5 mmol) with stirring. After completion of addition the solution was allowed to warm up to room temperature and stirred for 1 h. The reaction mixture was diluted with EtOAc (150 mL), then washed with saturated sodium bicarbonate, and brine. The organic phase was dried over MgSO4 and concentrated in vacuo to yield 3′-chloro-2,3,5,6-tetrahydro-[1,2′]bipyrazinyl-4-carboxylic acid (3,5-bis-trifluoromethyl-phenyl)-amide (5.6 g, 100%) as a white solid.

Workup

  1. concentrationThe solution was concentrated in vacuo, which
  2. dissolutionwas then re-dissolved in dichloromethane (50 mL)
  3. stirringwith stirring
  4. additionAfter completion of addition the solution
  5. stirringstirred for 1 h
  6. washwashed with saturated sodium bicarbonate, and brine
  7. dry with materialThe organic phase was dried over MgSO4
  8. concentrationconcentrated in vacuo

Sources & evidence

ORD record
ord-c86b253f13dc4cb581fd580550ec7006
Source dataset
uspto-grants-2011_09
Patent number
US08013156B2

Reaction notes

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