Triphenylphosphine → methyl 2,2-dimethyl-4-[(4-{[5-(tetrahydro-2H-pyran-2-yloxy)-2-pentynyl]oxy)phenyl)sulfonyl]-3-thiomorpholine carboxylate

HRID 2084944Notes

Reaction equation

HRID 2084944 reaction equation
[CH3:1][O:2][C:3]([CH:5]1[C:10]([CH3:12])([CH3:11])[S:9][CH2:8][CH2:7][N:6]1[S:13]([C:16]1[CH:21]=[CH:20][C:19]([OH:22])=[CH:18][CH:17]=1)(=[O:15])=[O:14])=[O:4].[O:23]1[CH2:28][CH2:27][CH2:26][CH2:25][CH:24]1[O:29][CH2:30][CH2:31][C:32]#[C:33][CH2:34]O.C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.N(C(OCC)=O)=NC(OCC)=O>C1COCC1.C(OCC)(=O)C>[CH3:11][C:10]1([CH3:12])[S:9][CH2:8][CH2:7][N:6]([S:13]([C:16]2[CH:17]=[CH:18][C:19]([O:22][CH2:34][C:33]#[C:32][CH2:31][CH2:30][O:29][CH:24]3[CH2:25][CH2:26][CH2:27][CH2:28][O:23]3)=[CH:20][CH:21]=2)(=[O:15])=[O:14])[CH:5]1[C:3]([O:2][CH3:1])=[O:4]

Participants

7

Reactant 4

HCID 11776TriphenylphosphineHCID 220568ethyl N-ethoxycarbonyliminocarbamateHCID 110414015-(Tetrahydro-pyran-2-yloxy)-pent-2-yn-1-olHCID 227319314-(4-Hydroxy-benzenesulfonyl)-2,2-dimethyl-thiomorpholine-3-carboxylic acid methyl ester

Product 1

HCID 22645008methyl 2,2-dimethyl-4-[(4-{[5-(tetrahydro-2H-pyran-2-yloxy)-2-pentynyl]oxy)phenyl)sulfonyl]-3-thiomorpholine carboxylateYield 62%

Reagents, catalysts & solvents 2

HCID 8028TetrahydrofuranSolventHCID 8857Ethyl AcetateSolvent

Procedure

To a solution of 3.31 g (9.6 mmol) of 4-(4-hydroxy-benzenesulfonyl)-2,2-dimethyl-thiomorpholine-3-carboxylic acid methyl ester and 2.12 g (11.5 mmol) of 5-(tetrahydro-2H-pyran-2-yloxy)-2-pentyn-1-ol in 15 mL of THF was added 3.0 g (11.5 mmol) of triphenylphosphine, followed by dropwise addition of 1.8 mL (11.5 mmol) of diethyl azodicarboxylate. The resulting solution was stirred at room temperature for 18 h. The reaction was diluted with ethyl acetate, washed with water and brine, dried over MgSO4, filtered and concentrated in vacuo. The residue was chromatographed on silica gel eluting with ethyl acetate:hexanes (1:9) to provide 3.03 g (62%) of methyl 2,2-dimethyl-4-[(4-{[5-(tetrahydro-2H-pyran-2-yloxy)-2-pentynyl]oxy}phenyl)sulfonyl]-3-thiomorpholine carboxylate as a colorless oil.

Workup

  1. washwashed with water and brine
  2. dry with materialdried over MgSO4
  3. filtrationfiltered
  4. concentrationconcentrated in vacuo
  5. customThe residue was chromatographed on silica gel eluting with ethyl acetate:hexanes (1:9)

Sources & evidence

ORD record
ord-23caf0de220b44d981ec61a7dcf44418
Source dataset
uspto-grants-2004_04
Patent number
US06716833B2

Reaction notes

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