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Uridine → 6-{4-(4-(2,4-Dioxo-3,4-dihydro-2H-pyrimidin-1-yl)-6-hydroxymethyl-tetrahydro-furo(3,4-d)(1,3)dioxol-2-yl)-phenoxy}-hexanoic acid ethyl ester

HRID 1797382
Notes
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Reaction equation

HRID 1797382 reaction equation
[C@@H:1]1([N:10]2[CH:17]=[CH:16][C:14](=[O:15])[NH:13][C:11]2=[O:12])[O:9][C@H:6]([CH2:7][OH:8])[C@@H:4]([OH:5])[C@H:2]1[OH:3].[CH2:18]([O:20][C:21](=[O:39])[CH2:22][CH2:23][CH2:24][CH2:25][CH2:26][O:27][C:28]1[CH:33]=[CH:32][C:31]([CH:34](OC)OC)=[CH:30][CH:29]=1)[CH3:19].O.C1(C)C=CC(S(O)(=O)=O)=CC=1.C(N(CC)CC)C>CN(C=O)C>[CH2:18]([O:20][C:21](=[O:39])[CH2:22][CH2:23][CH2:24][CH2:25][CH2:26][O:27][C:28]1[CH:33]=[CH:32][C:31]([CH:34]2[O:5][CH:4]3[CH:6]([CH2:7][OH:8])[O:9][CH:1]([N:10]4[CH:17]=[CH:16][C:14](=[O:15])[NH:13][C:11]4=[O:12])[CH:2]3[O:3]2)=[CH:30][CH:29]=1)[CH3:19]
ParticipantsConditionsProcedureWorkupSources & evidenceReaction notes

Participants

6

Reactant 4

HCID 6029UridineHCID 8471TriethylamineHCID 521998p-Toluenesulfonic acid monohydrateHCID 695885636-(4-Dimethoxymethyl-phenoxy)-hexanoic acid ethyl ester

Product 1

HCID 695881876-{4-(4-(2,4-Dioxo-3,4-dihydro-2H-pyrimidin-1-yl)-6-hydroxymethyl-tetrahydro-furo(3,4-d)(1,3)dioxol-2-yl)-phenoxy}-hexanoic acid ethyl ester

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent

Conditions

Temperature
50 °C

Procedure

Uridine 5 (7, 50 g, 0.21 mol) together with 4 (70 g, 0.23 mol) was dissolved in DMF (150 mL). p-Toluenesulfonic acid monohydrate (3.8 g, 20 mmol) was added, the mixture was placed on a Buechi R-134 rotavapor and agitated under reduced pressure (70 mbar) at 50° C. for 15 h. The mixture was then neutralized with triethylamine (2.8 ml, 20 mmol) and subsequently concentrated in vacuo. The resulting residue was suspended in EtOAc (400 mL), filtered and washed with 1:1 EtOAc/H2O (400 mL), H2O (2×200 mL), 1:1 H2O/Et2O (200 mL) and Et2O (2×200 mL) to give a colorless solid as a mixture of 2 diastereomers (6, 77 g, 0.16 mol, 76%). Upon recrystallisation from EtOH/EtOAc one of the diastereomers exclusively crystallized: M.p.: 176-178° C.; 1H-NMR (400 MHz, (CD3)2SO3) δ=11.38 (s, 1H), 7.82 (d, J=8.1, 1H), 7.42 (d, J8.6, 2H), 6.95 (d, J=8.6, 2H), 5.94 (s, 1H), 5.90 (s, 1H), 5.64 (d, J=8.1, 1H), 5.10 (t, J=5.2, 1H), 4.99 (m, 1H), 4.82 (m, 1H), 4.23 (m, 1H), 4.04 (q, J=7.1, 2H), 3.97 (t, J=6.3, 2H), 3.60 (m, 2H), 2.30 (t, J=7.4, 2H), 1.71 (m, 2H), 1.58 (m, 2H), 1.41 (m, 2H), 1.16 (t, J=7.1, 3H); 13C-NMR (400 MHz, (CD3)2SO) δ=172.8, 163.2, 159.7, 150.3, 142.1, 128.4 (2C), 128.0, 114.2 (2C), 106.5, 101.7, 91.3, 86.4, 84.2, 81.6, 67.4, 61.3, 59.6, 33.4, 28.3, 25.0, 24.2, 14.1; IR (film) ν=3467, 2933, 1692, 1677, 1248, 1116, 1077, 828; HRMS (MALDI-FTMS) m/z 513.1851 (513.1849 calculated for C24H30N2O9Na (M+Na)+).

Workup

  1. concentrationsubsequently concentrated in vacuo
  2. filtrationfiltered
  3. washwashed with 1:1 EtOAc/H2O (400 mL), H2O (2×200 mL), 1:1 H2O/Et2O (200 mL) and Et2O (2×200 mL)
  4. customto give a colorless solid
  5. additionas a mixture of 2 diastereomers (6, 77 g, 0.16 mol, 76%)
  6. customUpon recrystallisation from EtOH/EtOAc one of the diastereomers
  7. customexclusively crystallized

Sources & evidence

ORD record
ord-a07287336a1b442ba6c7b02783fb1f00
Source dataset
uspto-grants-2006_04
DOI
10.6084/m9.figshare.5104873.v1
Patent number
US07034147B2

Reaction notes

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On this pageParticipantsConditionsProcedureWorkupSources & evidenceReaction notes