4-Chlorobenzenesulfonyl chloride → (2S,4R)-1-allyloxycarbonyl-2-p-chlorobenzenesulfonyloxy methyl-4-methanesulfonyloxypyrrolidine

HRID 1034523Notes

Reaction equation

HRID 1034523 reaction equation
[CH2:1]([O:4][C:5]([N:7]1[CH2:11][C@H:10]([O:12][S:13]([CH3:16])(=[O:15])=[O:14])[CH2:9][C@H:8]1[CH2:17][OH:18])=[O:6])[CH:2]=[CH2:3].[Cl:19][C:20]1[CH:25]=[CH:24][C:23]([S:26](Cl)(=[O:28])=[O:27])=[CH:22][CH:21]=1.C(N(CC)CC)C>ClCCl>[CH2:1]([O:4][C:5]([N:7]1[CH2:11][C@H:10]([O:12][S:13]([CH3:16])(=[O:14])=[O:15])[CH2:9][C@H:8]1[CH2:17][O:18][S:26]([C:23]1[CH:24]=[CH:25][C:20]([Cl:19])=[CH:21][CH:22]=1)(=[O:28])=[O:27])=[O:6])[CH:2]=[CH2:3]

Participants

5

Reactant 3

HCID 73984-Chlorobenzenesulfonyl chlorideHCID 8471TriethylamineHCID 18639172(2S,4R)-1-allyloxycarbonyl-4-methanesulfonyloxypyrrolidine-2-methanol

Product 1

HCID 22851791(2S,4R)-1-allyloxycarbonyl-2-p-chlorobenzenesulfonyloxy methyl-4-methanesulfonyloxypyrrolidineYield 105%

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent2×

Procedure

To a solution of (2S,4R)-1-allyloxycarbonyl-4-methanesulfonyloxypyrrolidine-2-methanol (13.4 g: 50 mmole) in dichloromethane (50 ml), p-chlorobenzenesulfonyl chloride (12.66 g: 60 mmole) is added in a nitrogen atmosphere at room temperature and a solution of triethylamine (8.69 ml: 62.5 mmole) in dichloromethane (10 ml) is further added dropwise. The mixture is stirred at room temperature overnight. The reaction mixture is successively washed with aqueous sodium hydrogen carbonate and saturated brine, dried over magnesium sulfate, concentrated in vacuo, and purified by silica gel chromatography (toluene-ethyl acetate) to give crude (2S,4R)-1-allyloxycarbonyl-2-p-chlorobenzenesulfonyloxy methyl-4-methanesulfonyloxypyrrolidine (23.73 g) as oil. Yield: 105%. NMR δ(CDCl3) ppm: 2.2 to 2.6(m, 2H), 3.04(s, 3H), 3.58(dd, J=5.0 Hz, J=11.4 Hz, 1H), 3.8 to 4.0(m, 1H), 4.1 to 4.3(m, 3H), 4.5(m, 3H), 5.1 to 5.4(m, 3H), 5.7 to 6.0(m, 1H).

Workup

  1. washThe reaction mixture is successively washed with aqueous sodium hydrogen carbonate and saturated brine
  2. dry with materialdried over magnesium sulfate
  3. concentrationconcentrated in vacuo
  4. custompurified by silica gel chromatography (toluene-ethyl acetate)

Sources & evidence

ORD record
ord-3fe3c5b84df9490392b37b8fec117244
Source dataset
uspto-grants-1994_05
Patent number
US05317016

Reaction notes

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