1-(3-((((3aR,4R,6R,6aR)-6-(6-amino-9H-purin-9-yl)-2,2-dimethyltetrahydrofuro[3,4-d][1,3]dioxol-4-yl)methyl)(methyl)amino)cyclobutyl)-3-(4-(tert-butyl)phenyl)urea → 1-(3-((((2R,3S,4R,5R)-5-(6-amino-9H-purin-9-yl)-3,4-dihydroxytetrahydrofuran-2-yl)methyl)(methyl)amino)cyclobutyl)-3-(4-(tert-butyl)phenyl)urea

HRID 2040650Notes

Reaction equation

HRID 2040650 reaction equation
[NH2:1][C:2]1[N:10]=[CH:9][N:8]=[C:7]2[C:3]=1[N:4]=[CH:5][N:6]2[C@H:11]1[C@@H:15]2[O:16]C(C)(C)[O:18][C@@H:14]2[C@@H:13]([CH2:21][N:22]([CH3:41])[CH:23]2[CH2:26][CH:25]([NH:27][C:28]([NH:30][C:31]3[CH:36]=[CH:35][C:34]([C:37]([CH3:40])([CH3:39])[CH3:38])=[CH:33][CH:32]=3)=[O:29])[CH2:24]2)[O:12]1>C(O)(C(F)(F)F)=O.O>[NH2:1][C:2]1[N:10]=[CH:9][N:8]=[C:7]2[C:3]=1[N:4]=[CH:5][N:6]2[C@@H:11]1[O:12][C@H:13]([CH2:21][N:22]([CH3:41])[CH:23]2[CH2:26][CH:25]([NH:27][C:28]([NH:30][C:31]3[CH:36]=[CH:35][C:34]([C:37]([CH3:38])([CH3:39])[CH3:40])=[CH:33][CH:32]=3)=[O:29])[CH2:24]2)[C@@H:14]([OH:18])[C@H:15]1[OH:16]

Participants

4

Reactant 1

HCID 677772951-(3-((((3aR,4R,6R,6aR)-6-(6-amino-9H-purin-9-yl)-2,2-dimethyltetrahydrofuro[3,4-d][1,3]dioxol-4-yl)methyl)(methyl)amino)cyclobutyl)-3-(4-(tert-butyl)phenyl)urea

Product 1

HCID 677758951-(3-((((2R,3S,4R,5R)-5-(6-amino-9H-purin-9-yl)-3,4-dihydroxytetrahydrofuran-2-yl)methyl)(methyl)amino)cyclobutyl)-3-(4-(tert-butyl)phenyl)ureaYield 65%

Reagents, catalysts & solvents 2

HCID 962WaterSolventHCID 6422Trifluoroacetic acidSolvent

Procedure

A solution of 1-(3-((((3aR,4R,6R,6aR)-6-(6-amino-9H-purin-9-yl)-2,2-dimethyltetrahydrofuro[3,4-d][1,3]dioxol-4-yl)methyl)(methyl)amino)cyclobutyl)-3-(4-(tert-butyl)phenyl)urea (125 mg, 0.23 mmol) in TFA (0.90 mL) and 0.10 mL of water were stirred for 1 hour at room temperature. The reaction was concentrated to dryness, dissolved in MeOH (5 mL) and K2CO3 (60 mg) in 0.5 mL of water was added dropwise. The reaction was stirred at rt for 0.5 h and concentrated to obtain the residue which was purified by prep-TLC (DCM:MeOH:NH4OH=300:30:8, VAT) to obtain the desired compound (75 mg, Yield: 65%) as pale white solid. 1H NMR (500 MHz, MeOD): δH 8.27 (s, 1H), 8.21 (s, 1H), 7.28-7.20 (m, 4H), 6.00-5.99 (m, 1H), 4.77-4.75 (m, 1H), 4.28-4.23 (m, 2H), 3.92-3.88 (m, 1H), 2.92 (brs, 1H), 2.83-2.81 (m, 2H), 2.59-2.56 (m, 2H), 2.32 (s, 3H), 1.74-1.64 (m, 2H), 1.27 (s, 9 H) ppm; ESI-MS (m/z): 525.3 [M+1]+.

Workup

  1. concentrationThe reaction was concentrated to dryness
  2. dissolutiondissolved in MeOH (5 mL)
  3. additionK2CO3 (60 mg) in 0.5 mL of water was added dropwise
  4. concentrationconcentrated
  5. customto obtain the residue which
  6. customwas purified by prep-TLC (DCM:MeOH:NH4OH=300:30:8, VAT)

Sources & evidence

ORD record
ord-14b451066a204e3daabf1572a116ac9f
Source dataset
uspto-grants-2013_11
Patent number
US08580762B2

Reaction notes

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