2,2-Dimethoxypropane → ((3aR,4R,6R,6aS)-6-(5-Iodo-6-methoxy-2-(methylthio)pyrimidin-4-ylamino)-2,2-dimethyltetrahydro-3aH-cyclopenta[d][1,3]dioxol-4-yl)methanol

HRID 1507478Notes

Reaction equation

HRID 1507478 reaction equation
[OH:1][CH2:2][C@H:3]1[CH2:7][C@@H:6]([NH:8][C:9]2[C:14]([I:15])=[C:13]([O:16][CH3:17])[N:12]=[C:11]([S:18][CH3:19])[N:10]=2)[C@H:5]([OH:20])[C@@H:4]1[OH:21].CO[C:24](OC)([CH3:26])[CH3:25].CCN(CC)CC>CC(C)=O.CS(O)(=O)=O>[I:15][C:14]1[C:9]([NH:8][C@H:6]2[C@@H:5]3[O:20][C:24]([CH3:26])([CH3:25])[O:21][C@@H:4]3[C@@H:3]([CH2:2][OH:1])[CH2:7]2)=[N:10][C:11]([S:18][CH3:19])=[N:12][C:13]=1[O:16][CH3:17]

Participants

6

Reactant 3

HCID 64952,2-DimethoxypropaneHCID 8471TriethylamineHCID 117677905(1S,2R,3R,5R)-3-(Hydroxymethyl)-5-(5-iodo-6-methoxy-2-(methylthio)pyrimidin-4-ylamino)cyclopentane-1,2-diol

Product 1

HCID 117677839((3aR,4R,6R,6aS)-6-(5-Iodo-6-methoxy-2-(methylthio)pyrimidin-4-ylamino)-2,2-dimethyltetrahydro-3aH-cyclopenta[d][1,3]dioxol-4-yl)methanol

Reagents, catalysts & solvents 2

HCID 6395Methanesulfonic AcidCatalystHCID 180AcetoneSolvent

Conditions

Temperature
0 °C

Procedure

Compound 5 (4.00 g, 9.36 mmol) was dissolved in acetone (10 mL) and 2,2-dimethoxypropane (5.75 mL, 46.8 mmol) was added. The solution was cooled to 0° C. and methanesulfonic acid (2 drops) was added. The solution was stirred for 15 min and Et3N (1 mL) was added. The acetone was evaporated and the residue was dissolved in EtOAc, washed with water and brine, dried (MgSO4), filtered and concentrated. The residue was purified via column chromatography on silica gel (EtOAc/hexanes) to give the title compound as a white solid. 1H NMR (CDCl3) δ 6.21 (d, J=8 Hz, 1H), 4.65-4.59 (m, 2H), 4.45-4.44 (m, 1H), 3.94 (s, 3H), 3.89-3.85 (m, 1H), 3.76-3.73 (m, 1H), 2.61-2.55 (m, 1H), 2.52 (s, 3H), 2.40-2.34 (m, 1H), 1.85 (br s, 1H), 1.65-1.57 (m, 2H), 1.49 (s, 3H), 1.28 (s, 3H); LCMS 2.54 min, 468 (M+H).

Workup

  1. customThe acetone was evaporated
  2. dissolutionthe residue was dissolved in EtOAc
  3. washwashed with water and brine
  4. dry with materialdried (MgSO4)
  5. filtrationfiltered
  6. concentrationconcentrated
  7. customThe residue was purified via column chromatography on silica gel (EtOAc/hexanes)

Sources & evidence

ORD record
ord-29b201806dd549258b9d8e9107ad2337
Source dataset
uspto-grants-2015_12
Patent number
US09221809B2

Reaction notes

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