2,2-Dimethoxypropane → {(3aR,4R,6R,6aS)-6-[(6-Chloropyrimidin-4-yl)amino}-2,2-dimethyltetrahydro-3aH-cyclopenta[d][1,3]dioxol-4-yl]methanol

HRID 447571Notes

Reaction equation

HRID 447571 reaction equation
[Cl:1][C:2]1[N:7]=[CH:6][N:5]=[C:4]([NH:8][C@@H:9]2[CH2:13][C@H:12]([CH2:14][OH:15])[C@@H:11]([OH:16])[C@H:10]2[OH:17])[CH:3]=1.O.[C:19]1(C)[CH:24]=CC(S(O)(=O)=O)=C[CH:20]=1.COC(OC)(C)C>CO>[Cl:1][C:2]1[N:7]=[CH:6][N:5]=[C:4]([NH:8][C@H:9]2[C@@H:10]3[O:17][C:19]([CH3:24])([CH3:20])[O:16][C@@H:11]3[C@@H:12]([CH2:14][OH:15])[CH2:13]2)[CH:3]=1

Participants

5

Reactant 3

HCID 64952,2-DimethoxypropaneHCID 521998p-Toluenesulfonic acid monohydrateHCID 59671293(1R,2S,3R,5R)-3-[(6-chloropyrimidin-4-yl)amino]-5-(hydroxymethyl)cyclopentane-1,2-diol

Product 1

HCID 59671267{(3aR,4R,6R,6aS)-6-[(6-Chloropyrimidin-4-yl)amino}-2,2-dimethyltetrahydro-3aH-cyclopenta[d][1,3]dioxol-4-yl]methanolYield 45.9%

Reagents, catalysts & solvents 1

HCID 887MethanolSolvent

Procedure

A solution of (1R,2S,3R,5R)-3-[(6-chloropyrimidin-4-yl)amino]-5-(hydroxymethyl)cyclopentane-1,2-diol (255 mg, 0.982 mmol), p-toluenesulfonic acid monohydrate (187 mg, 0.982 mmol) and 2,2-dimethoxypropane (0.670 mL, 0.545 mmol) in MeOH (5.00 mL) was stirred overnight. The reaction was quenched via addition of saturated aqueous NaHCO3 solution (10 mL) and MeOH was removed in vacuo. The aqueous mixture was extracted with DCM (4×20 mL) and the combined organics were concentrated in vacuo. The crude mixture was purified via silica gel chromatography eluting with a gradient of 0 to 10% MeOH in DCM to afford the title compound (135 mg, 45.8%). LC/MS: Rt=1.77 min, ES+ 300. (AA standard).

Workup

  1. customThe reaction was quenched via addition of saturated aqueous NaHCO3 solution (10 mL) and MeOH
  2. customwas removed in vacuo
  3. extractionThe aqueous mixture was extracted with DCM (4×20 mL)
  4. concentrationthe combined organics were concentrated in vacuo
  5. customThe crude mixture was purified via silica gel chromatography
  6. washeluting with a gradient of 0 to 10% MeOH in DCM

Sources & evidence

ORD record
ord-ae36477bf1f24cd185e14d70498ead5b
Source dataset
uspto-grants-2013_07
Patent number
US08481550B2

Reaction notes

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