1-Chloroethyl chloroformate → HCID 22174822, compound

HRID 1796982Notes

Reaction equation

HRID 1796982 reaction equation
[C:1]1([S:7]([N:10]2[C:18]3[C:13](=[C:14]([N:19]4[CH2:24][CH2:23][N:22](CC5C=CC=CC=5)[CH2:21][CH2:20]4)[CH:15]=[CH:16][CH:17]=3)[CH:12]=[N:11]2)(=[O:9])=[O:8])[CH:6]=[CH:5][CH:4]=[CH:3][CH:2]=1.[Cl:32]C(OC(Cl)C)=O>ClCCCl>[ClH:32].[C:1]1([S:7]([N:10]2[C:18]3[C:13](=[C:14]([N:19]4[CH2:24][CH2:23][NH:22][CH2:21][CH2:20]4)[CH:15]=[CH:16][CH:17]=3)[CH:12]=[N:11]2)(=[O:9])=[O:8])[CH:2]=[CH:3][CH:4]=[CH:5][CH:6]=1

Participants

4

Reactant 2

HCID 5213051-Chloroethyl chloroformateHCID 22174832HCID 22174832, compound

Product 1

HCID 22174822HCID 22174822, compoundYield 63%

Reagents, catalysts & solvents 1

HCID 111,2-DichloroethaneSolvent

Procedure

A solution of 1-phenylsulfonyl-4-(4-benzylpiperazin-1-yl)-1H-indazole (433 mg, 1.0 mmol) in 1,2-dichloroethane is treated with 1-chloroethyl chloroformate (0.27 mL, 2.5 mmol) heated at reflux temperature for 2 hr, and concentrated in vacuo. The resultant residue is heated at reflux temperature in methanol for 1.5 hr, cooled, concentrated in vacuo and reconcentrated from ether. The resulting tan solid is triturated with ether and crystallized from hot ethanol to give the title compound as a tan solid 237 mg (63% yield), mp 203–205° C., identified by HNMR and mass spectral analyses.

Workup

  1. temperatureheated
  2. temperatureat reflux temperature for 2 hr
  3. concentrationconcentrated in vacuo
  4. temperatureThe resultant residue is heated
  5. temperatureat reflux temperature in methanol for 1.5 hr
  6. temperaturecooled
  7. concentrationconcentrated in vacuo
  8. customThe resulting tan solid is triturated with ether
  9. customcrystallized from hot ethanol

Sources & evidence

ORD record
ord-5eb6ee34b059410e9952f0c800b4f9df
Source dataset
uspto-grants-2006_04
Patent number
US07034029B2

Reaction notes

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