Ammonium Chloride → tert-butyl N'-[2-(2-chloroethoxy)-2-(4-fluorophenyl)acetyl]-hydrazinecarboxylate

HRID 546767Notes

Reaction equation

HRID 546767 reaction equation
O=C1N(P(Cl)(N2CCOC2=O)=O)CCO1.[Cl:16][CH2:17][CH2:18][O:19][CH:20]([C:24]1[CH:29]=[CH:28][C:27]([F:30])=[CH:26][CH:25]=1)[C:21]([OH:23])=O.[C:31]([O:35][C:36]([CH3:39])([CH3:38])[CH3:37])(=[O:34])[NH:32][NH2:33].[Cl-].[NH4+]>O1CCCC1.C(OCC)(=O)C.C(N(CC)CC)C>[Cl:16][CH2:17][CH2:18][O:19][CH:20]([C:24]1[CH:29]=[CH:28][C:27]([F:30])=[CH:26][CH:25]=1)[C:21]([NH:33][NH:32][C:31]([O:35][C:36]([CH3:39])([CH3:38])[CH3:37])=[O:34])=[O:23]

Participants

8

Reactant 4

HCID 25517Ammonium ChlorideHCID 70091tert-Butyl carbazateHCID 152842Bis(2-oxo-3-oxazolidinyl)phosphinic chlorideHCID 66839523(2-Chloroethoxy)-(4-fluorophenyl)acetic acid

Product 1

HCID 66839491tert-butyl N'-[2-(2-chloroethoxy)-2-(4-fluorophenyl)acetyl]-hydrazinecarboxylateYield 93.9%

Reagents, catalysts & solvents 3

HCID 8028TetrahydrofuranSolventHCID 8471TriethylamineSolventHCID 8857Ethyl AcetateSolvent

Procedure

Bis(2-oxo-3-oxazolidinyl)phosphinic acid chloride (4.38 g) was added to a solution of (2-chloroethoxy)-(4-fluorophenyl)acetic acid (2 g), tert-butyl carbazate (2.27 g) and triethylamine (3.58 mL) in tetrahydrofuran (20 mL), and the reaction solution was stirred at room temperature for 16 hours. Saturated aqueous ammonium chloride and ethyl acetate were added to the reaction solution, and the organic layer was separated. The organic layer was washed with brine and dried over anhydrous magnesium sulfate. The solvent was evaporated under reduced pressure. The residue was purified by silica gel column chromatography (carrier: Chromatorex, elution solvent: heptane/ethyl acetate) to obtain the title compound (2.8 g). The property values of the compound are as follows.

Workup

  1. customthe organic layer was separated
  2. washThe organic layer was washed with brine
  3. dry with materialdried over anhydrous magnesium sulfate
  4. customThe solvent was evaporated under reduced pressure
  5. customThe residue was purified by silica gel column chromatography (carrier: Chromatorex, elution solvent: heptane/ethyl acetate)

Sources & evidence

ORD record
ord-3bd53134f151472dbdb305eed5e484e3
Source dataset
uspto-grants-2011_05
Patent number
US07935815B2

Reaction notes

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