Triethylamine → 5-[4-[4-(6-chloro-2-pyrazinyl)-1-piperazinyl]butyl]tetrahydro-1H-thieno[3',4':3,4]cyclobuta[1,2-c]pyrrole-4,6(3H,5H)-dione 2,2 dioxide, hydrochloride

HRID 344788Notes

Reaction equation

HRID 344788 reaction equation
Br[CH2:2][CH2:3][CH2:4][CH2:5][N:6]1[C:10](=[O:11])[CH:9]2[CH:12]3[CH2:16][S:15](=[O:18])(=[O:17])[CH2:14][CH:13]3[CH:8]2[C:7]1=[O:19].Cl.[Cl:21][C:22]1[N:27]=[C:26]([N:28]2[CH2:33][CH2:32][NH:31][CH2:30][CH2:29]2)[CH:25]=[N:24][CH:23]=1.C(N(CC)CC)C>CN(C)C=O>[ClH:21].[Cl:21][C:22]1[N:27]=[C:26]([N:28]2[CH2:29][CH2:30][N:31]([CH2:2][CH2:3][CH2:4][CH2:5][N:6]3[C:10](=[O:11])[CH:9]4[CH:12]5[CH2:16][S:15](=[O:18])(=[O:17])[CH2:14][CH:13]5[CH:8]4[C:7]3=[O:19])[CH2:32][CH2:33]2)[CH:25]=[N:24][CH:23]=1

Participants

5

Reactant 3

HCID 8471TriethylamineHCID 198421MK-212 hydrochlorideHCID 679226745-(4-bromobutyl)tetrahydro-1H-thieno-[3',4':3,4]cyclobuta[1,2-c]pyrrole-4,6(3H,5H)dione 2,2-dioxide

Product 1

HCID 140865415-[4-[4-(6-chloro-2-pyrazinyl)-1-piperazinyl]butyl]tetrahydro-1H-thieno[3',4':3,4]cyclobuta[1,2-c]pyrrole-4,6(3H,5H)-dione 2,2 dioxide, hydrochloride

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent

Procedure

A solution of 2.0 g of 5-(4-bromobutyl)tetrahydro-1H-thieno-[3',4':3,4]cyclobuta[1,2-c]pyrrole-4,6(3H,5H)dione 2,2-dioxide in 50 ml of dimethylformamide is added to a stirred solution 2.0 g (0.007 mol) of 1-(6-chloro-2-pyrazinyl)-piperazine hydrochloride and 4 ml of triethylamine. The reaction mixture is stirred overnight and the solvent is removed under vacuum. The residue is partitioned between water and methlene chloride. The methylene chloride extracts are combined, washed with brine and dried over anhydrous sodium sulfate. Filtration and roto-evaporation gives the crude free base. Preparative HPLC [silica gel; ethyl acetate:methylene chloride (9:1)] followed by evaporation of the appropriate fractions (TLC Rf=0.4), treatment with ethanolic hydrogen chloride and recrystallization from ethanol gives the title compound: m.p. 154°-157° C.

Workup

  1. customthe solvent is removed under vacuum
  2. customThe residue is partitioned between water and methlene chloride
  3. washwashed with brine
  4. dry with materialdried over anhydrous sodium sulfate
  5. filtrationFiltration and roto-evaporation
  6. customgives the crude free base
  7. customPreparative HPLC [silica gel; ethyl acetate:methylene chloride (9:1)] followed by evaporation of the appropriate fractions (TLC Rf=0.4), treatment with ethanolic hydrogen chloride and recrystallization from ethanol

Sources & evidence

ORD record
ord-22f4fe30766a4172b0be42fbef327d49
Source dataset
uspto-grants-1991_10
Patent number
US05053508

Reaction notes

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