1,8-Diazabicyclo(5.4.0)undec-7-ene → (3R,3aR,6R,6aR)-6-(6-chloro-5-iodo-3-((2-(trimethylsilyl)ethoxy)methyl)-3H-imidazo[4,5-b]pyridin-2-yloxy)hexahydrofuro[3,2-b]furan-3-ol

HRID 1485604Notes

Reaction equation

HRID 1485604 reaction equation
[O:1]1[CH2:5][C@@H:4]([OH:6])[C@H:3]2[O:7][CH2:8][C@@H:9]([OH:10])[C@@H:2]12.N12CCCN=C1CCCCC2.[Cl:22][C:23]1[CH:24]=[C:25]2[N:32]=[C:31](S(C)(=O)=O)[N:30]([CH2:37][O:38][CH2:39][CH2:40][Si:41]([CH3:44])([CH3:43])[CH3:42])[C:26]2=[N:27][C:28]=1[I:29]>CN(C)C=O>[Cl:22][C:23]1[CH:24]=[C:25]2[N:32]=[C:31]([O:6][C@H:4]3[C@H:3]4[O:7][CH2:8][C@@H:9]([OH:10])[C@H:2]4[O:1][CH2:5]3)[N:30]([CH2:37][O:38][CH2:39][CH2:40][Si:41]([CH3:44])([CH3:43])[CH3:42])[C:26]2=[N:27][C:28]=1[I:29]

Participants

5

Reactant 3

HCID 811841,8-Diazabicyclo(5.4.0)undec-7-eneHCID 109756241,4:3,6-Dianhydro-D-mannitolHCID 1235023166-Chloro-5-iodo-2-(methylsulfonyl)-3-((2-(trimethylsilyl)ethoxy)methyl)-3H-imidazo[4,5-b]pyridine

Product 1

HCID 123413447(3R,3aR,6R,6aR)-6-(6-chloro-5-iodo-3-((2-(trimethylsilyl)ethoxy)methyl)-3H-imidazo[4,5-b]pyridin-2-yloxy)hexahydrofuro[3,2-b]furan-3-ol

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent2×

Procedure

(3R,3aR,6R,6aR)-Hexahydrofuro[3,2-b]furan-3,6-diol (1.84 g) is dissolved in N,N-dimethylformamide (10 mL) and treated with 1,8-diazabicyclo[5.4.0]undec-7-ene (DBU; 1.9 mL). A solution of 6-chloro-5-iodo-2-(methylsulfonyl)-3-(2-trimethylsilanyl-ethoxymethyl)-3H-imidazo[4,5-b]pyridine (2.05 g) in N,N-dimethylformamide (20 mL) is added drop wise and the mixture is stirred for 2 hours at room temperature. The mixture is partitioned between water and ethyl acetate and the organic phase is washed with brine and dried (MgSO4). The solvents are evaporated in vacuo and the residue is chromatographed on silica gel (cyclohexane/ethyl acetate 80:20→0:100) to give the title compound. LC (method 1): tR=1.17 min; Mass spectrum (ESI+): m/z=554 [M+H]+.

Workup

  1. customThe mixture is partitioned between water and ethyl acetate
  2. washthe organic phase is washed with brine
  3. dry with materialdried (MgSO4)
  4. customThe solvents are evaporated in vacuo
  5. customthe residue is chromatographed on silica gel (cyclohexane/ethyl acetate 80:20→0:100)

Sources & evidence

ORD record
ord-d770946225894cee90db59537512ef90
Source dataset
uspto-grants-2016_08
Patent number
US09422312B2

Reaction notes

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