Chloroacetyl chloride → Methyl 1-(Chloroacetyl)-4-(4-methoxybenzenesulfonyl)-2,3,4,5-tetrahydro-1H-[1,4]benzodiazepine-3-carboxylate

HRID 1264608Notes

Reaction equation

HRID 1264608 reaction equation
[CH3:1][O:2][C:3]1[CH:8]=[CH:7][C:6]([S:9]([N:12]2[CH2:18][C:17]3[CH:19]=[CH:20][CH:21]=[CH:22][C:16]=3[NH:15][CH2:14][CH:13]2[C:23]([O:25][CH3:26])=[O:24])(=[O:11])=[O:10])=[CH:5][CH:4]=1.C(N(CC)CC)C.[Cl:34][CH2:35][C:36](Cl)=[O:37]>C(Cl)Cl.O>[Cl:34][CH2:35][C:36]([N:15]1[C:16]2[CH:22]=[CH:21][CH:20]=[CH:19][C:17]=2[CH2:18][N:12]([S:9]([C:6]2[CH:7]=[CH:8][C:3]([O:2][CH3:1])=[CH:4][CH:5]=2)(=[O:10])=[O:11])[CH:13]([C:23]([O:25][CH3:26])=[O:24])[CH2:14]1)=[O:37]

Participants

6

Reactant 3

HCID 6577Chloroacetyl chloride2×HCID 8471Triethylamine2×HCID 18612753Methyl 4-(4-Methoxybenzenesulfonyl)-2,3,4,5-tetrahydro-1H-[1,4]benzodiazepine-3-carboxylate

Product 1

HCID 18612717Methyl 1-(Chloroacetyl)-4-(4-methoxybenzenesulfonyl)-2,3,4,5-tetrahydro-1H-[1,4]benzodiazepine-3-carboxylateYield 24.9%

Reagents, catalysts & solvents 2

HCID 962WaterSolventHCID 6344DichloromethaneSolvent2×

Conditions

Temperature
0 °C

Procedure

To a mixture of 2.5 g (6.64 mmol) of methyl 4-(4-methoxybenzenesulfonyl)-2,3,4,5-tetrahydro-1H-[1,4]benzodiazepine-3-carboxylate (Reference Example 12) and 4.63 ml (33.2 mmol) of triethylamine in 40 ml of CH2Cl2 cooled to 0° C. was added to 1.65 g (14.63 mmol) of chloroacetyl chloride. The solution was stirred at room temperature for 2 days, chilled to 0° C. and 926 μl of triethylamine and 750 mg of chloroacetyl chloride were added thereto. The mixture was stirred at room temperature overnight, diluted with CH2Cl2 and H2O. The insoluble solid was filtered off. The organic layer of the filtrate was separated , washed with brine, dried with Na2SO4 and filtered through diatomaceous earth. The solvent was removed and the residue triturated with ethyl acetate and a trace of ethanol. Chilling and filtering gave 0.75 g of methyl 1-(chloroacetyl)-4-(4-methoxybenzenesulfonyl)-2,3,4,5-tetrahydro-1H-[1,4]benzo-diazepine-3-carboxylate (Reference EXample 91). Anal. for C20H21ClN2O6S: Calc'd: C, 53.0; H, 4.7; N, 6.2; Found: C, 51.6; H, 4.6; N, 5.7.

Workup

  1. temperaturechilled to 0° C.
  2. stirringThe mixture was stirred at room temperature overnight
  3. filtrationThe insoluble solid was filtered off
  4. customThe organic layer of the filtrate was separated
  5. washwashed with brine
  6. dry with materialdried with Na2SO4
  7. filtrationfiltered through diatomaceous earth
  8. customThe solvent was removed
  9. customthe residue triturated with ethyl acetate
  10. temperatureChilling
  11. filtrationfiltering

Sources & evidence

ORD record
ord-317932ecc8264d1b99d6521409c7972d
Source dataset
uspto-grants-2003_04
Patent number
US06544984B1

Reaction notes

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