Cesium carbonate → HCID 24944883, compound

HRID 1157428Notes

Reaction equation

HRID 1157428 reaction equation
I[C:2]1[N:3]=[C:4]([NH2:20])[C:5]2[N:6]=[CH:7][N:8]([C:18]=2[N:19]=1)[C@@H:9]1[O:17][C@H:14]([CH2:15][OH:16])[C@@H:12]([OH:13])[C@H:10]1[OH:11].[F:21][C:22]([F:37])([F:36])[C:23]1[CH:24]=[C:25](B(O)O)[CH:26]=[C:27]([C:29]([F:32])([F:31])[F:30])[CH:28]=1.C(=O)([O-])[O-].[Cs+].[Cs+]>C1(C)C=CC=CC=1.C(O)C.C1C=CC([P]([Pd]([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)[P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)=CC=1>[NH2:20][C:4]1[N:3]=[C:2]([C:25]2[CH:26]=[C:27]([C:29]([F:32])([F:30])[F:31])[CH:28]=[C:23]([C:22]([F:21])([F:37])[F:36])[CH:24]=2)[N:19]=[C:18]2[C:5]=1[N:6]=[CH:7][N:8]2[C@H:9]1[C@H:10]([OH:11])[C@H:12]([OH:13])[C@@H:14]([CH2:15][OH:16])[O:17]1

Participants

7

Reactant 3

HCID 10796Cesium carbonateHCID 1562653,5-Bis-trifluoromethylphenylboronic acidHCID 1696622-Iodoadenosine

Product 1

HCID 24944883HCID 24944883, compoundYield 30%

Reagents, catalysts & solvents 3

HCID 178418397HCID 178418397, compoundCatalystHCID 702EthanolSolventHCID 1140TolueneSolvent

Procedure

A solution of 2-iodo adenosine (1.00 g, 2.53 mmol), 3,5-bis(trifluoromethyl)phenylboronic acid (784 mg, 3.04 mmol), cesium carbonate (1.81 g, 6.08 mmol) and Pd(PPh3)4 (293 mg, 0.25 mmol) in toluene (2.4 mL) and ethanol (4.8 mL) was heated in a Biotage microwave (120° C., absorption high, pre-stirring 30 s) for 40 min in 2 batches and the crude reaction mixtures were combined. The solvents were then removed in vacuo and the residue dissolved in EtOAc (200 mL) and washed with sat. aq. NaHCO3 (100 mL) and brine (100 mL). Purification by flash column chromatography (normal phase, ICN silica, 50 g, 18-32μ, gradient 5-25% ethanol in DCM, residue dry loaded, product eluted in 25% ethanol) afforded (2R,3R,4S,5R)-2-{6-amino-2-[3,5-bis(trifluoromethyl)phenyl]-9H-purin-9-yl}-5-(hydroxymethyl)tetrahydrofuran-3,4-diol 11 as an off-white glass (364 mg, 30%).

Workup

  1. customthe crude reaction mixtures
  2. customThe solvents were then removed in vacuo
  3. dissolutionthe residue dissolved in EtOAc (200 mL)
  4. washwashed with sat. aq. NaHCO3 (100 mL) and brine (100 mL)
  5. customPurification
  6. dry with materialby flash column chromatography (normal phase, ICN silica, 50 g, 18-32μ, gradient 5-25% ethanol in DCM, residue dry loaded, product eluted in 25% ethanol)

Sources & evidence

ORD record
ord-835947945e774987821cf6c142202fd5
Source dataset
uspto-grants-2010_10
Patent number
US07807685B2

Reaction notes

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