Toluene → 3-(4'-Ethoxy-2,2',3,3'-tetrafluorobiphenyl-4-yl)-6-(4-propylcyclohexyl)tetrahydropyran-2-ol

HRID 1941725Notes

Reaction equation

HRID 1941725 reaction equation
C1(C)C=CC=CC=1.[CH2:8]([O:10][C:11]1[CH:16]=[CH:15][C:14]([C:17]2[CH:22]=[CH:21][C:20]([CH:23]3[CH2:28][CH2:27][CH:26]([CH:29]4[CH2:34][CH2:33][CH:32]([CH2:35][CH2:36][CH3:37])[CH2:31][CH2:30]4)[O:25][C:24]3=[O:38])=[C:19]([F:39])[C:18]=2[F:40])=[C:13]([F:41])[C:12]=1[F:42])[CH3:9].[H-].C([Al+]CC(C)C)C(C)C>C(O)=O>[CH2:8]([O:10][C:11]1[CH:16]=[CH:15][C:14]([C:17]2[CH:22]=[CH:21][C:20]([CH:23]3[CH2:28][CH2:27][CH:26]([CH:29]4[CH2:30][CH2:31][CH:32]([CH2:35][CH2:36][CH3:37])[CH2:33][CH2:34]4)[O:25][CH:24]3[OH:38])=[C:19]([F:39])[C:18]=2[F:40])=[C:13]([F:41])[C:12]=1[F:42])[CH3:9]

Participants

5

Reactant 3

HCID 1140Toluene2×HCID 21225700DiisobutylaluminumhydrideHCID 585356163-(4'-Ethoxy-2,2',3,3'-tetrafluorobiphenyl-4-yl)-6-(4-propylcyclohexyl)tetrahydropyran-2-one

Product 1

HCID 585356523-(4'-Ethoxy-2,2',3,3'-tetrafluorobiphenyl-4-yl)-6-(4-propylcyclohexyl)tetrahydropyran-2-olYield 99%

Reagents, catalysts & solvents 1

HCID 284Formic AcidSolvent

Procedure

Toluene (20 ml) was added to 3-(4′-ethoxy-2,2′,3,3′-tetrafluorobiphenyl-4-yl)-6-(4-propylcyclohexyl)tetrahydropyran-2-one (11) (2.35 g) prepared in the ninth step. A toluene solution of diisobutylaluminum hydride (0.99 M; 9.6 ml) was added dropwise at −50° C. or lower, and the stirring was continued for 3 hours. The reaction mixture was poured into a 10% aqueous solution of formic acid (50 ml) to give two layers. The water layer was extracted with toluene (20 ml) twice and the combined organic layer was washed with water, and then dried over anhydrous magnesium sulfate. The solvent was distilled off under reduced pressure to leave 3-(4′-ethoxy-2,2′,3,3′-tetrafluorobiphenyl-4-yl)-6-(4-propylcyclohexyl)tetrahydropyran-2-ol (12) (2.29 g) in 99% yield.

Workup

  1. customprepared in the ninth step
  2. customto give two layers
  3. extractionThe water layer was extracted with toluene (20 ml) twice
  4. washthe combined organic layer was washed with water
  5. dry with materialdried over anhydrous magnesium sulfate
  6. distillationThe solvent was distilled off under reduced pressure

Sources & evidence

ORD record
ord-049b9a6afd59455d86d9e852754942a8
Source dataset
uspto-grants-2013_03
Patent number
US08389073B2

Reaction notes

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