Dimethyl Sulfoxide → 5-(phenylsulfonyl)-3-pyridinyl 2,3,4-tri-O-acetyl-5-thio-beta-D-xylopyranoside

HRID 1685452Notes

Reaction equation

[C:1]([O:4][C@@H:5]1[C@@H:18]([O:19][C:20](=[O:22])[CH3:21])[C@H:17]([O:23][C:24](=[O:26])[CH3:25])[CH2:16][S:15][C@H:6]1[O:7][C:8]1[CH:9]=[N:10][CH:11]=[C:12](I)[CH:13]=1)(=[O:3])[CH3:2].CS(C)=O.[C:31]1([S:37]([O-:39])=[O:38])[CH:36]=[CH:35][CH:34]=[CH:33][CH:32]=1.CNCCNC>C(OCC)(=O)C.O>[C:1]([O:4][C@@H:5]1[C@@H:18]([O:19][C:20](=[O:22])[CH3:21])[C@H:17]([O:23][C:24](=[O:26])[CH3:25])[CH2:16][S:15][C@H:6]1[O:7][C:8]1[CH:9]=[N:10][CH:11]=[C:12]([S:37]([C:31]2[CH:36]=[CH:35][CH:34]=[CH:33][CH:32]=2)(=[O:39])=[O:38])[CH:13]=1)(=[O:3])[CH3:2]

Participants

Conditions

Temperature: 130 °C

Procedure

0.495 g (1 mM) of 5-iodo-3-pyridinyl 2,3,4-tri-O-acetyl-5-thio-β-D-xylo-pyranoside, 4 ml of DMSO, 0.025 g (0.05 mM) of benzene/copper trifluoro-methanesulfonate complex, 0.196 g (1.2 mM) of phenyl sulfinate and 0.0088 g (0.1 mM) of N,N′-dimethylethylenediamine are mixed under an argon atmosphere in a reactor adapted for microwaves. The mixture is heated at 130° C. for 3 hours by microwaves. Water is added to the cooled reaction mixture and extraction is carried out with ethyl acetate. The organic phase is washed with water, dried over sodium sulfate, filtered and concentrated under reduced pressure. The evaporation residue is purified by chromatography on silica gel using a toluene/acetone mixture (9/1; v/v) as the eluent to give the expected product in the form of a white solid with a yield of 43%.

Workup

washThe organic phase is washed with water
dry with materialdried over sodium sulfate
filtrationfiltered
concentrationconcentrated under reduced pressure
customThe evaporation residue is purified by chromatography on silica gel using a toluene/acetone mixture (9/1; v/v) as the eluent

Sources & evidence

ORD record: ord-f93cd801a7d04807a7ee9881e6925eff
Source dataset: uspto-grants-2012_04
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08148407B2

Reaction notes

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