Triphenylphosphine → t-Butyl N-[4-[(4-chlorophenyl)sulfonyl]-4-(2,5-difluorophenyl)-3-methylbutyl]-N-methylsulfonylcarbamate

HRID 748787Notes

Reaction equation

HRID 748787 reaction equation
[Cl:1][C:2]1[CH:7]=[CH:6][C:5]([S:8]([CH:11]([C:17]2[CH:22]=[C:21]([F:23])[CH:20]=[CH:19][C:18]=2[F:24])[CH:12]([CH3:16])[CH2:13][CH2:14]O)(=[O:10])=[O:9])=[CH:4][CH:3]=1.[CH3:25][S:26]([NH:29][C:30](=[O:36])[O:31][C:32]([CH3:35])([CH3:34])[CH3:33])(=[O:28])=[O:27].C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.N(C([O-])=O)=NC([O-])=O>O1CCCC1.C(OCC)(=O)C.CCCCCC>[Cl:1][C:2]1[CH:3]=[CH:4][C:5]([S:8]([CH:11]([C:17]2[CH:22]=[C:21]([F:23])[CH:20]=[CH:19][C:18]=2[F:24])[CH:12]([CH3:16])[CH2:13][CH2:14][N:29]([S:26]([CH3:25])(=[O:28])=[O:27])[C:30](=[O:36])[O:31][C:32]([CH3:33])([CH3:35])[CH3:34])(=[O:10])=[O:9])=[CH:6][CH:7]=1

Participants

8

Reactant 4

HCID 11776TriphenylphosphineHCID 10081367tert-Butyl methylsulfonylcarbamateHCID 230288584-(4-Chlorophenylsulfonyl)-4-(2,5-difluorophenyl)-3-methyl-1-butanolHCID 51573101N-carboxylatoiminocarbamate

Product 1

HCID 59750918t-Butyl N-[4-[(4-chlorophenyl)sulfonyl]-4-(2,5-difluorophenyl)-3-methylbutyl]-N-methylsulfonylcarbamateYield 95%

Reagents, catalysts & solvents 3

HCID 8028TetrahydrofuranSolventHCID 8058HexaneSolventHCID 8857Ethyl AcetateSolvent

Procedure

The 4-[(4-chlorophenyl)sulfonyl]-4-(2,5-difluorophenyl)-3-methyl-1-butanol (97.2 mg, 0.259 mmol) obtained in Example 239, t-butyl N-methylsulfonylcarbamate (101 mg, 0.518 mmol) and triphenylphosphine (138 mg, 0.518 mmol) were dissolved in tetrahydrofuran (3 ml), followed by the addition of diisoopropyl azodicarboxylate (102 μl, 0.518 mmol) at room temperature. The reaction mixture was stirred at room temperature for 18 hours. The reaction mixture was diluted with ethyl acetate, washed with a saturated aqueous solution of ammonium chloride, water and brine, dried over magnesium sulfate and then concenetrated. The residue thus obtained was subjected to flash chromatography on a silica gel column, and the fraction obtained from the hexane:ethyl acetate=3:2 eluate was concentrated, whereby the title compound (136 mg, 0.246 mmol, 95%) was obtained as a colorless amorphous substance.

Workup

  1. washwashed with a saturated aqueous solution of ammonium chloride, water and brine
  2. dry with materialdried over magnesium sulfate
  3. customThe residue thus obtained
  4. concentrationethyl acetate=3:2 eluate was concentrated

Sources & evidence

ORD record
ord-9a178c1732f54e668839a27f67d06acf
Source dataset
uspto-grants-2008_07
Patent number
US07399775B2

Reaction notes

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