Triethylamine → Ethyl 6-[4-[(2,4-dichlorobenzoyl)amino]benzoyl]-5,6-dihydropyrazolo[4,3-d][1]benzazepine-2(4H)-acetate

HRID 962605Notes

Reaction equation

HRID 962605 reaction equation
[NH2:1][C:2]1[CH:29]=[CH:28][C:5]([C:6]([N:8]2[C:14]3[CH:15]=[CH:16][CH:17]=[CH:18][C:13]=3[C:12]3=[N:19][N:20]([CH2:22][C:23]([O:25][CH2:26][CH3:27])=[O:24])[CH:21]=[C:11]3[CH2:10][CH2:9]2)=[O:7])=[CH:4][CH:3]=1.C(N(CC)CC)C.[Cl:37][C:38]1[CH:46]=[C:45]([Cl:47])[CH:44]=[CH:43][C:39]=1[C:40](Cl)=[O:41]>C(Cl)Cl>[Cl:37][C:38]1[CH:46]=[C:45]([Cl:47])[CH:44]=[CH:43][C:39]=1[C:40]([NH:1][C:2]1[CH:3]=[CH:4][C:5]([C:6]([N:8]2[C:14]3[CH:15]=[CH:16][CH:17]=[CH:18][C:13]=3[C:12]3=[N:19][N:20]([CH2:22][C:23]([O:25][CH2:26][CH3:27])=[O:24])[CH:21]=[C:11]3[CH2:10][CH2:9]2)=[O:7])=[CH:28][CH:29]=1)=[O:41]

Participants

5

Reactant 3

HCID 8471TriethylamineHCID 666452,4-Dichlorobenzoyl chlorideHCID 53685015HCID 53685015, compound

Product 1

HCID 18940516Ethyl 6-[4-[(2,4-dichlorobenzoyl)amino]benzoyl]-5,6-dihydropyrazolo[4,3-d][1]benzazepine-2(4H)-acetate

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent2×

Procedure

To a stirred solution of 0.940 g of ethyl 6-(4-aminobenzoyl)-5,6-dihydropyrazolo[4,3-d] [1]benzazepine-2(4H)-acetate in 25 ml of methylene chloride is added 369 μl of triethylamine followed by the dropwise addition of 373 μl of 2,4-dichlorobenzoyl chloride in 3.5 ml of methylene chloride. The reaction mixture is stirred at room temperature for 18 hours, washed with water, saturated NaHCO3, brine and the organic layer treated with activated carbon, and filtered through MgSO4. The filtrate is concentrated in vacuo to a residue which is purified by flash chromatography on silica gel using 25% ethyl acetate in methylene chloride to give 380 mg of the desired product as white crystals, m.p. 164°-167° C. The mother liquors are combined, evaporated in vacuo to a residue which is dissolved in 25% ethyl acetate in chloroform to give 535 mg of off-white solid, m.p. 160°-163.5° C.

Workup

  1. washwashed with water, saturated NaHCO3, brine
  2. additionthe organic layer treated with activated carbon
  3. filtrationfiltered through MgSO4
  4. concentrationThe filtrate is concentrated in vacuo to a residue which
  5. customis purified by flash chromatography on silica gel using 25% ethyl acetate in methylene chloride

Sources & evidence

ORD record
ord-d14a2157dc76407dac6bf06d97609c2c
Source dataset
uspto-grants-1998_06
Patent number
US05760031

Reaction notes

Loading…