Acetic Acid → (2R,3R,4S,5R)-2-[2-[(Cyclohexylamino)methyl]-6-[(2,2-diphenylethyl)amino]-9H-purin-9-yl]-5-(methoxymethyl)tetrahydro-3,4-furandiol

HRID 2268345Notes

Reaction equation

HRID 2268345 reaction equation
[NH2:1][CH2:2][C:3]1[N:11]=[C:10]2[C:6]([N:7]=[CH:8][N:9]2[C@H:12]2[C@H:16]([OH:17])[C@H:15]([OH:18])[C@@H:14]([CH2:19][O:20][CH3:21])[O:13]2)=[C:5]([NH:22][CH2:23][CH:24]([C:31]2[CH:36]=[CH:35][CH:34]=[CH:33][CH:32]=2)[C:25]2[CH:30]=[CH:29][CH:28]=[CH:27][CH:26]=2)[N:4]=1.[C:37]1(=O)[CH2:42][CH2:41][CH2:40][CH2:39][CH2:38]1.C(O[BH-](OC(=O)C)OC(=O)C)(=O)C.[Na+].C(O)(=O)C>O1CCCC1.C(OCC)C>[CH:37]1([NH:1][CH2:2][C:3]2[N:11]=[C:10]3[C:6]([N:7]=[CH:8][N:9]3[C@H:12]3[C@H:16]([OH:17])[C@H:15]([OH:18])[C@@H:14]([CH2:19][O:20][CH3:21])[O:13]3)=[C:5]([NH:22][CH2:23][CH:24]([C:31]3[CH:36]=[CH:35][CH:34]=[CH:33][CH:32]=3)[C:25]3[CH:26]=[CH:27][CH:28]=[CH:29][CH:30]=3)[N:4]=2)[CH2:42][CH2:41][CH2:40][CH2:39][CH2:38]1

Participants

7

Reactant 4

HCID 176Acetic AcidHCID 7967CyclohexanoneHCID 5049666Sodium triacetoxyborohydrideHCID 9897827(2R,3R,4S,5R)-2-{2-(Aminomethyl)-6-[(2,2-diphenylethyl)amino]-9H-purin-9-yl}-5-(methoxymethyl)tetrahydro-3,4-furandiol

Product 1

HCID 9851062(2R,3R,4S,5R)-2-[2-[(Cyclohexylamino)methyl]-6-[(2,2-diphenylethyl)amino]-9H-purin-9-yl]-5-(methoxymethyl)tetrahydro-3,4-furandiolYield 63.5%

Reagents, catalysts & solvents 2

HCID 3283Diethyl EtherSolventHCID 8028TetrahydrofuranSolvent3×

Procedure

(2R,3R,4S,5R)-2-{2-(Aminomethyl)-6-[(2,2-diphenylethyl)amino]-9H-purin-9-yl}-5-(methoxymethyl)tetrahydro-3,4-furandiol (example 1) (110 mg, 0.22 mmol) was dissolved (using gentle heating) in dry tetrahydrofuran (20 ml) and the stirred solution treated with a solution of cyclohexanone (22 mg, 0.22 mmol) in dry tetrahydrofuran (2 ml) followed by addition of sodium triacetoxyborohydride (70 mg, 0.33 mmol) and a solution of acetic acid (0.14 ml, 0.25 mmol) in dry tetrahydrofuran (2 ml). The mixture was then stirred at room temperature for 24 hr. The reaction mixture was diluted with diethyl ether, washed with saturated aqueous sodium hydrogen carbonate, brine, dried with anhydrous magnesium sulfate and the solvent removed under reduced pressure. The residue was purified by column chromatography on silica gel eluting with a gradient system of dichloromethane:methanol:ammonia (95:5:0.5) changing to dichloromethane:methanol:ammonia (90:10:1) to afford the title compound as a solid (80 mg). MS: 573 (MH+).

Workup

  1. washwashed with saturated aqueous sodium hydrogen carbonate, brine
  2. dry with materialdried with anhydrous magnesium sulfate
  3. customthe solvent removed under reduced pressure
  4. customThe residue was purified by column chromatography on silica gel eluting with a gradient system of dichloromethane:methanol:ammonia (95:5:0.5)

Sources & evidence

ORD record
ord-2d3463fa6afe431d9edb9d5c1fed5f10
Source dataset
uspto-grants-2001_12
Patent number
US06326359B1

Reaction notes

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