Trifluoroacetic acid → 5-(2-Chloroethyl)Oxindole

HRID 1935385Notes

Reaction equation

HRID 1935385 reaction equation
[Cl:1][CH2:2][C:3]([C:5]1[CH:6]=[C:7]2[C:11](=[CH:12][CH:13]=1)[NH:10][C:9](=[O:14])[CH2:8]2)=O.FC(F)(F)C(O)=O.C([SiH](CC)CC)C>>[Cl:1][CH2:2][CH2:3][C:5]1[CH:6]=[C:7]2[C:11](=[CH:12][CH:13]=1)[NH:10][C:9](=[O:14])[CH2:8]2

Participants

4

Reactant 3

HCID 6422Trifluoroacetic acidHCID 12052TriethylsilaneHCID 20605765-(Chloroacetyl)-1,3-dihydro-2H-indol-2-one

Product 1

HCID 145813925-(2-Chloroethyl)Oxindole

Procedure

To a 100 ml round-bottomed flask equipped with condenser and nitrogen inlet were added 5.0 grams (23.9 mmol) of 5-chloroacetyl oxindole and 18.5 ml triflouroacetic acid. To the stirring solution was added 8.77 ml (54.9 mmol) of triethylsilane while cooling to prevent exotherm, and the reaction stirred 16 hours at room temperature. The reaction was then poured into ice water, stirred and the beige solid filtered, washed with water and hexane, and dried to give 5-(2-chloroethyl)oxindole, m.p. 168°-170° C., 3.0 grams (64%).

Workup

  1. customTo a 100 ml round-bottomed flask equipped with condenser and nitrogen inlet
  2. temperaturewhile cooling
  3. stirringstirred
  4. filtrationthe beige solid filtered
  5. washwashed with water and hexane
  6. customdried

Sources & evidence

ORD record
ord-7528f7536a394b56b12517bc4ab9e470
Source dataset
uspto-grants-2002_05
Patent number
US06387904B2

Reaction notes

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