2-(4'-Chlorobenzoyl)benzoic acid → 3-(p-Chlorophenyl)-3-[2-(4-methylphenylsulfonylamino)ethylamino]phthalide

HRID 267535

Reaction equation

HRID 267535 reaction equation
[Cl:1][C:2]1[CH:18]=[CH:17][C:5]([C:6]([C:8]2[CH:16]=[CH:15][CH:14]=[CH:13][C:9]=2[C:10]([OH:12])=O)=[O:7])=[CH:4][CH:3]=1.[NH2:19][CH2:20][CH2:21][NH:22][S:23]([C:26]1[CH:31]=[CH:30][C:29]([CH3:32])=[CH:28][CH:27]=1)(=[O:25])=[O:24].[K+].[Br-]>C(O)C.O.C1(C)C=CC=CC=1>[Cl:1][C:2]1[CH:3]=[CH:4][C:5]([C:6]2([NH:19][CH2:20][CH2:21][NH:22][S:23]([C:26]3[CH:31]=[CH:30][C:29]([CH3:32])=[CH:28][CH:27]=3)(=[O:25])=[O:24])[C:8]3[C:9](=[CH:13][CH:14]=[CH:15][CH:16]=3)[C:10](=[O:12])[O:7]2)=[CH:17][CH:18]=1

Participants

7

Reactant 3

HCID 665642-(4'-Chlorobenzoyl)benzoic acidHCID 253877Potassium BromideHCID 301318N-(2-Aminoethyl)-4-methylbenzenesulfonamide

Product 1

HCID 214233433-(p-Chlorophenyl)-3-[2-(4-methylphenylsulfonylamino)ethylamino]phthalide

Reagents, catalysts & solvents 3

HCID 702EthanolSolventHCID 962WaterSolvent2×HCID 1140TolueneSolvent

Procedure

To a flask equipped with a Dean-Stark water separator is charged 500 ml. of toluene, 24.0 g. (0.10 mole) of 2-(p-chlorobenzoyl) benzoic acid and 21.4 g. (0.10 mole) of N-(2-aminoethyl)-4-methylbenzene sulfonamide. The mixture is stirred and refluxed until the water level in the separator is constant. The reaction is then allowed to cool to room temperature and the resultant solid is filtered off, washed with 100 ml. of toluene and dried to give the above named phalide; m.p. 177°-179°C.: infrared (KBr), peaks at 3.00, 3.09, 3.37, 3.42, 3.48, 5.76, 6.25, 6.71, 7.42, 7.72, 8.58, 9.12, 9.90, 11.45, 12.80, 13.70, 17.30 and 18.20μ; ultraviolet (95% ethanol) maximum at 226 mμ (E 1cm 1% 637), 257 mμ (shoulder); N.M.R. (pyridine- d6) δ 2.22 (CH3), 3.57(4H, NCH2CH2N unresolved multiplet). Analysis: Calculated for C23H21ClN2O4S: C 60.4; H 4.6; N 6.1; Cl 7.8; S 7.0; Found: C 60.2; H 4.9; N 6.1; Cl 7.7; S 7.7.

Workup

  1. additionis charged 500 ml
  2. filtrationthe resultant solid is filtered off
  3. washwashed with 100 ml
  4. dry with materialof toluene and dried
  5. customto give the above named phalide

Sources & evidence

ORD record
ord-5bc188ccd2404aabafc568d5aa22a4bb
Source dataset
uspto-grants-1976_03
Patent number
US03943147

Linked notes

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