4-Formylbenzoic acid → 2,2,2-Trifluoro-1-methyl-1-(trifluoromethyl)ethyl 4-formylbenzoate

HRID 852840Notes

Reaction equation

HRID 852840 reaction equation
[C:1]([C:4]1[CH:11]=[CH:10][C:7]([CH:8]=[O:9])=[CH:6][CH:5]=1)([OH:3])=[O:2].[F:12][C:13]([F:22])([F:21])[C:14]([CH3:20])(O)[C:15]([F:18])([F:17])[F:16].CCN=C=NCCCN(C)C>CN(C1C=CN=CC=1)C.C(Cl)Cl>[CH:8]([C:7]1[CH:10]=[CH:11][C:4]([C:1]([O:3][C:14]([CH3:20])([C:15]([F:18])([F:17])[F:16])[C:13]([F:22])([F:21])[F:12])=[O:2])=[CH:5][CH:6]=1)=[O:9]

Participants

6

Reactant 3

HCID 120884-Formylbenzoic acidHCID 159081-Ethyl-3-(3'-dimethylaminopropyl)carbodiimideHCID 739361,1,1,3,3,3-Hexafluoro-2-methylpropan-2-ol

Product 1

HCID 589307202,2,2-Trifluoro-1-methyl-1-(trifluoromethyl)ethyl 4-formylbenzoate

Reagents, catalysts & solvents 2

HCID 142844-(Dimethylamino)pyridineCatalystHCID 6344DichloromethaneSolvent

Procedure

A mixture of 41.1 g (274 mmol) 4-carboxybenzaldehyde, 50 g (274 mmol) 1,1,1,3,3,3-hexafluoro-2-methyl-2-propanol, and 33.4 g (274 mmol) DMAP in 700 mL DCM was stirred until homogeneous (approximately 0.5 hr). The solution was cooled over an ice bath, under Ar, and 52.3 g (274 mmol) EDCI was added portion-wise. The reaction was stirred at RT for 48 hr. and concentrated to an oil on the rotovap. The oil was taken up with EA and washed with water, 2× with dil. Citric acid, 2× with dil. Sodium bicarbonate, and brine. The organic layer was dried over sodium sulfate and concentrated to 25.5 g pale yellow solid.

Workup

  1. additionwas added portion-wise
  2. stirringThe reaction was stirred at RT for 48 hr
  3. concentrationand concentrated to an oil on the rotovap
  4. washwashed with water, 2× with dil. Citric acid, 2× with dil. Sodium bicarbonate, and brine
  5. dry with materialThe organic layer was dried over sodium sulfate
  6. concentrationconcentrated to 25.5 g pale yellow solid

Sources & evidence

ORD record
ord-66de9cb60bcf462daef36f75b48c70a8
Source dataset
uspto-grants-2007_08
Patent number
US07253208B2

Reaction notes

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