Dimethylformamide → 2-Methoxy-6-(6-methoxy-4-((1-phenyl-1H-1,2,3-triazol-4-yl)methoxy)benzofuran-2-yl)imidazo[2,1-b][1,3,4]thiadiazole

HRID 1424355

Reaction equation

HRID 1424355 reaction equation
[CH3:1][O:2][C:3]1[S:7][C:6]2=[N:8][C:9]([C:11]3[O:12][C:13]4[CH:19]=[C:18]([O:20][CH3:21])[CH:17]=[C:16]([O:22][CH2:23][C:24]#[CH:25])[C:14]=4[CH:15]=3)=[CH:10][N:5]2[N:4]=1.[N:26]([C:29]1[CH:34]=[CH:33][CH:32]=[CH:31][CH:30]=1)=[N+:27]=[N-:28].CN(C=O)C.O[C@H]([C@@H]1C([O-])=C(O)C(=O)O1)CO.[Na+]>ClCCl.O.O.O.O.O.S([O-])([O-])(=O)=O.[Cu+2]>[CH3:1][O:2][C:3]1[S:7][C:6]2=[N:8][C:9]([C:11]3[O:12][C:13]4[CH:19]=[C:18]([O:20][CH3:21])[CH:17]=[C:16]([O:22][CH2:23][C:24]5[N:28]=[N:27][N:26]([C:29]6[CH:34]=[CH:33][CH:32]=[CH:31][CH:30]=6)[CH:25]=5)[C:14]=4[CH:15]=3)=[CH:10][N:5]2[N:4]=1

Participants

7

Reactant 4

HCID 6228DimethylformamideHCID 69319AzidobenzeneHCID 23667548Sodium AscorbateHCID 867008962-Methoxy-6-(6-methoxy-4-(prop-2-yn-1-yloxy)benzofuran-2-yl)imidazo[2,1-b][1,3,4]thiadiazole

Product 1

HCID 721933332-Methoxy-6-(6-methoxy-4-((1-phenyl-1H-1,2,3-triazol-4-yl)methoxy)benzofuran-2-yl)imidazo[2,1-b][1,3,4]thiadiazoleYield 49%

Reagents, catalysts & solvents 2

HCID 24463Copper sulfate pentahydrateCatalystHCID 6344DichloromethaneSolvent

Procedure

A solution of 2-methoxy-6-(6-methoxy-4-(prop-2-yn-1-yloxy)benzofuran-2-yl)imidazo[2,1-b][1,3,4]thiadiazole (Example 9A, 20 mgs, 0.056 mmol) and azidobenzene (Example 9B, 19 mgs, 0.159 mmol) in DMF (4 mL, 51.7 mmol) was treated at r.t. and under a nitrogen atmosphere with sodium (R)-2-((S)-1,2-dihydroxyethyl)-4-hydroxy-5-oxo-2,5-dihydrofuran-3-olate (8 mgs, 0.040 mmol) and copper(II) sulfate pentahydrate (5 mgs, 0.020 mmol). The mixture was stirred for 2 hours (reaction followed by HPLC) and was then diluted with dichloromethane (60 mL) and washed with sat. NaHCO3, brine and dried (MgSO4). The solvent was evaporated and the solid residue was triturated with acetonitrile (2×1 mL) and lyophilized to give the title material (13 mgs, 0.027 mmol, 49% yield). LC (Method A): 2.213 min. HRMS (ESI) calcd for C23H19N6O4S [M+H]+ m/z 475.1183. found 475.1204. 1H NMR (DMSO-d6, 400 MHz) δ ppm: 9.04 (s, 1H), 8.37 (s, 1H), 7.90-7.99 (m, 2H), 7.58-7.67 (m, 2H), 7.51 (tt, J=7.4, 1.2 Hz, 1H), 6.97-7.03 (m, 1H), 6.83-6.88 (m, 1H), 6.71 (d, J=1.6 Hz, 1H), 5.38 (s, 3H), 4.20 (s, 3H), 3.83 (s, 3H).

Workup

  1. custom(reaction followed by HPLC)
  2. washwashed with sat. NaHCO3, brine
  3. dry with materialdried (MgSO4)
  4. customThe solvent was evaporated
  5. customthe solid residue was triturated with acetonitrile (2×1 mL)

Sources & evidence

ORD record
ord-562fb128c29d481b8b68457c56d3a0f8
Source dataset
uspto-grants-2015_01
Patent number
US08927688B2

Linked notes

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