p-Toluenesulfonic acid → Trans 5-(t-Butyldiphenylsilyloxymethyl)-2-(Diethyloxyphosphinoylmethyl)-1,3-Oxathiolane

HRID 636885Notes

Reaction equation

HRID 636885 reaction equation
C(O[CH:4](OCC)[CH2:5][P:6]([O:11][CH2:12][CH3:13])([O:8][CH2:9][CH3:10])=[O:7])C.[Si:17]([O:34][CH2:35][CH:36]([OH:39])[CH2:37][SH:38])([C:30]([CH3:33])([CH3:32])[CH3:31])([C:24]1[CH:29]=[CH:28][CH:27]=[CH:26][CH:25]=1)[C:18]1[CH:23]=[CH:22][CH:21]=[CH:20][CH:19]=1.CC1C=CC(S(O)(=O)=O)=CC=1.C(=O)(O)[O-].[Na+]>C1(C)C=CC=CC=1>[Si:17]([O:34][CH2:35][C@@H:36]1[O:39][C@@H:4]([CH2:5][P:6]([O:11][CH2:12][CH3:13])([O:8][CH2:9][CH3:10])=[O:7])[S:38][CH2:37]1)([C:30]([CH3:33])([CH3:31])[CH3:32])([C:24]1[CH:29]=[CH:28][CH:27]=[CH:26][CH:25]=1)[C:18]1[CH:19]=[CH:20][CH:21]=[CH:22][CH:23]=1

Participants

6

Reactant 4

HCID 6101p-Toluenesulfonic acidHCID 82071Diethyl (2,2-diethoxyethyl)phosphonateHCID 516892Sodium BicarbonateHCID 212558771-t-BUTYLDIPHENYLSILYLOXY-3-MERCAPTO-2-PROPANOL

Product 1

HCID 131720788Trans 5-(t-Butyldiphenylsilyloxymethyl)-2-(Diethyloxyphosphinoylmethyl)-1,3-OxathiolaneYield 87%

Reagents, catalysts & solvents 1

HCID 1140TolueneSolvent

Procedure

To a solution of diethylphosphonoacetaldehyde diethylacetal (12.23 g, 48.1 mmol, 1.2 eq.) and t-butyldiphenylsilyloxy-3-mercapto-2-propanol (13.63 g, 38.1 mmol, 1.2 eq.) in toluene (500 mL) was added pTSA (0.73 g, 3.8 mmol, 0.1 eq.). The mixture was stirred at reflux for 72 hr and was cooled to room temperature. A saturated solution of sodium bicarbonate was added and the aqueous phase was extracted with dichloromethane. The organic phase was dried with anhydrous magnesium sulphate and evaporated under reduced pressure. The crude material was purified by flash chromatography with ethyl acetate:hexane (2:1), and gave 16.31 g of the compound in a 87% yield.

Workup

  1. temperatureat reflux for 72 hr
  2. extractionthe aqueous phase was extracted with dichloromethane
  3. dry with materialThe organic phase was dried with anhydrous magnesium sulphate
  4. customevaporated under reduced pressure
  5. customThe crude material was purified by flash chromatography with ethyl acetate:hexane (2:1)

Sources & evidence

ORD record
ord-dc43165b541d41b7a4eec7e35be70f3f
Source dataset
uspto-grants-2001_02
Patent number
US06194576B1

Reaction notes

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