3-[3-(4-Ethyl-2,2,7-trimethyl-3-oxo-3,4-dihydro-2H-benzo[1,4]oxazin-6-yl)-4-trifluoromethoxy-phenyl]-acrylic acid tert-butyl ester → 3-[3-(4-Ethyl-2,2,7-trimethyl-3-oxo-3,4-dihydro-2H-benzo[1,4]oxazin-6-yl)-4-trifluoromethoxy-phenyl]-acrylic acid

HRID 2239242Notes

Reaction equation

HRID 2239242 reaction equation
C([O:5][C:6](=[O:36])[CH:7]=[CH:8][C:9]1[CH:14]=[CH:13][C:12]([O:15][C:16]([F:19])([F:18])[F:17])=[C:11]([C:20]2[C:21]([CH3:35])=[CH:22][C:23]3[O:28][C:27]([CH3:30])([CH3:29])[C:26](=[O:31])[N:25]([CH2:32][CH3:33])[C:24]=3[CH:34]=2)[CH:10]=1)(C)(C)C>ClCCl.FC(F)(F)C(O)=O>[CH2:32]([N:25]1[C:24]2[CH:34]=[C:20]([C:11]3[CH:10]=[C:9]([CH:8]=[CH:7][C:6]([OH:36])=[O:5])[CH:14]=[CH:13][C:12]=3[O:15][C:16]([F:19])([F:17])[F:18])[C:21]([CH3:35])=[CH:22][C:23]=2[O:28][C:27]([CH3:30])([CH3:29])[C:26]1=[O:31])[CH3:33]

Participants

4

Reactant 1

HCID 685832583-[3-(4-Ethyl-2,2,7-trimethyl-3-oxo-3,4-dihydro-2H-benzo[1,4]oxazin-6-yl)-4-trifluoromethoxy-phenyl]-acrylic acid tert-butyl ester

Product 1

HCID 685828733-[3-(4-Ethyl-2,2,7-trimethyl-3-oxo-3,4-dihydro-2H-benzo[1,4]oxazin-6-yl)-4-trifluoromethoxy-phenyl]-acrylic acidYield 100%

Reagents, catalysts & solvents 2

HCID 6344DichloromethaneSolventHCID 6422Trifluoroacetic acidSolvent

Procedure

A solution of Compound 1E (1.71 g, 3.4 mmol) in 15 mL of dichloromethane and 5 mL of trifluoroacetic acid was stirred at room temperature overnight. The reaction mixture was then concentrated on the rotary evaporator and redissolved in 20 mL of diethyl ether. To this solution, hexanes were added to give a cloudy solution from which 1.5 g (100%) of product precipitated out as a white solid (Compound 1). MS (electrospray): mass calculated for C23H22F3NO5, 449.15; m/z found 462.3, [M+H]+.

Workup

  1. concentrationThe reaction mixture was then concentrated on the rotary evaporator
  2. dissolutionredissolved in 20 mL of diethyl ether
  3. additionTo this solution, hexanes were added

Sources & evidence

ORD record
ord-5a05085655f84e11bd6d3dd074fcfe02
Source dataset
uspto-grants-2010_05
Patent number
US07723326B2

Reaction notes

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