Triphenylphosphine → t-butyl N-[5-[(4-Chlorophenyl)sulfonyl]-5-(2,5-difluorophenyl)pentyl]-N-methylsulfonylcarbamate

HRID 748785Notes

Reaction equation

HRID 748785 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])[CH2:12][CH2:13][CH2:14][CH2:15]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(OC(C)C)=O)=NC(OC(C)C)=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])[CH2:12][CH2:13][CH2:14][CH2:15][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 75555Diisopropyl diazene-1,2-dicarboxylateHCID 10081367tert-Butyl methylsulfonylcarbamateHCID 597508325-[(4-Chlorophenyl)sulfonyl]-5-(2,5-difluorophenyl)-1-pentanol

Product 1

HCID 59750747t-butyl N-[5-[(4-Chlorophenyl)sulfonyl]-5-(2,5-difluorophenyl)pentyl]-N-methylsulfonylcarbamateYield 99%

Reagents, catalysts & solvents 3

HCID 8028TetrahydrofuranSolventHCID 8058HexaneSolventHCID 8857Ethyl AcetateSolvent

Procedure

The 5-[(4-chlorophenyl)sulfonyl]-5-(2,5-difluorophenyl)-1-pentanol (115 mg, 0.307 mmol) obtained in Example 29, t-butyl N-methylsulfonylcarbamate (120 mg, 0.614 mmol), and triphenylphosphine (163 mg, 0.614 mmol) were dissolved in tetrahydrofuran (3 ml). At room temperature, diisopropyl azodicarboxylate (120 μl, 0.614 mmol) was added to the resulting solution. After stirring the resulting mixture for 18 hours at room temperature, the reaction mixture was diluted with ethyl acetate, washed with water and brine, dried over magnesium sulfate and then concentrated. The residue thus obtained was subjected to flash chromatography on a silica gel column, and the fraction obtained from the hexane:ethyl acetate=3:1 eluate was concentrated, whereby the title compound (168 mg, 0.304 mmol, 99%) was obtained as a colorless amorphous substance.

Workup

  1. washwashed with water and brine
  2. dry with materialdried over magnesium sulfate
  3. concentrationconcentrated
  4. customThe residue thus obtained
  5. concentrationethyl acetate=3:1 eluate was concentrated

Sources & evidence

ORD record
ord-12a6e30523754423847cc131aa7e9597
Source dataset
uspto-grants-2008_07
Patent number
US07399775B2

Reaction notes

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