Triethylamine → HCID 21625207, compound

HRID 358781Notes

Reaction equation

HRID 358781 reaction equation
[CH3:1][O:2][C:3]1[C:4]([O:17][CH3:18])=[CH:5][C:6]2[CH2:12][CH2:11][CH2:10][C:9]([C:13](Cl)=[O:14])=[CH:8][C:7]=2[CH:16]=1.Cl.Cl.[CH3:21][O:22][C:23]1[CH:24]=[C:25]([CH:37]=[C:38]([O:42][CH3:43])[C:39]=1[O:40][CH3:41])[CH2:26][N:27]1[CH2:32][CH2:31][NH:30][CH2:29][CH:28]1[C:33]([O:35][CH3:36])=[O:34].C(N(CC)CC)C>ClCCl>[CH3:1][O:2][C:3]1[C:4]([O:17][CH3:18])=[CH:5][C:6]2[CH2:12][CH2:11][CH2:10][C:9]([C:13]([N:30]3[CH2:31][CH2:32][N:27]([CH2:26][C:25]4[CH:37]=[C:38]([O:42][CH3:43])[C:39]([O:40][CH3:41])=[C:23]([O:22][CH3:21])[CH:24]=4)[CH:28]([C:33]([O:35][CH3:36])=[O:34])[CH2:29]3)=[O:14])=[CH:8][C:7]=2[CH:16]=1

Participants

5

Reactant 3

HCID 8471TriethylamineHCID 10264946HCID 10264946, compoundHCID 20066595HCID 20066595, compound

Product 1

HCID 21625207HCID 21625207, compound

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent2×

Procedure

In dichloromethane (18 ml) is dissolved 2,3-dimethoxy-6,7-dihydro-5H-benzocycloheptene-8-carbonyl chloride (1.44 g). The solution is added dropwise taking 5 minutes, while stirring at 0° C., to a mixture of methyl 1-(3,4,5-trimethoxybenzyl)piperazine-2carboxylate dihydrochloride (2.16 g), triethylamine (2.5 g) and dichloromethane (25 ml). The reaction mixture is stirred for one hour at room temperature, and then poured into ice-water, followed by extraction with dichloromethane. The organic layer is washed with water and dried, then the solvent is distilled off under reduced pressure. The residue is purified by means of a silica gel column chromatography (hexane:ethyl acetate:acetone =3:3:1) to afford methyl 4-(2 3-dimethoxy-6,7-dihydro-5H-benzocyclohepten-8-ylcarbonyl) -1-(3,4,5-trimethoxybenzyl)piperazine -2- carboxylate, which is identical with the product obtained in Working Example 25, as a colorless oily product (2.2 g).

Workup

  1. additionThe solution is added dropwise
  2. extractionfollowed by extraction with dichloromethane
  3. washThe organic layer is washed with water
  4. customdried
  5. distillationthe solvent is distilled off under reduced pressure
  6. customThe residue is purified by means of a silica gel column chromatography (hexane:ethyl acetate:acetone =3:3:1)

Sources & evidence

ORD record
ord-5394e59caa014b1a9f7494b61514bd6f
Source dataset
uspto-grants-1991_03
Patent number
US04997836

Reaction notes

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