Phthaloyl chloride → 9-Benzyloxy-6-phthalimidopurine

HRID 6251

Reaction equation

HRID 6251 reaction equation
[C:1](Cl)(=[O:11])[C:2]1[C:3](=[CH:7][CH:8]=[CH:9][CH:10]=1)[C:4](Cl)=[O:5].[CH2:13]([O:20][N:21]1[CH:29]=[N:28][C:27]2[C:22]1=[N:23][CH:24]=[N:25][C:26]=2[NH2:30])[C:14]1[CH:19]=[CH:18][CH:17]=[CH:16][CH:15]=1.C(N(CC)CC)C>CN(C)C1C=CN=CC=1.O1CCCC1>[CH2:13]([O:20][N:21]1[CH:29]=[N:28][C:27]2[C:22]1=[N:23][CH:24]=[N:25][C:26]=2[N:30]1[C:4](=[O:5])[C:3]2=[CH:7][CH:8]=[CH:9][CH:10]=[C:2]2[C:1]1=[O:11])[C:14]1[CH:19]=[CH:18][CH:17]=[CH:16][CH:15]=1

Participants

6

Reactant 3

HCID 6955Phthaloyl chlorideHCID 8471TriethylamineHCID 123544939-(Benzyloxy)-9H-purin-6-amine

Product 1

HCID 145239699-Benzyloxy-6-phthalimidopurineYield 49%

Reagents, catalysts & solvents 2

HCID 142844-(Dimethylamino)pyridineCatalystHCID 8028TetrahydrofuranSolvent

Procedure

Phthaloyl dichloride (13.35 g; 92.2 mmol) was added to a cooled solution of 9-benzyloxyadenine (14.9 g, 61.5 mmol), 4-dimethylaminopyridine (1.5 g, 12.3 mmol) and triethylamine (25.7 ml, 184.4 mmol) in tetrahydrofuran (200 ml). After 1 hour at room temperature the solvent was removed under reduced pressure and the residue partitioned between chloroform (500 ml) and saturated potassium bicarbonate (300 ml). The organic phase was separated, washed with water (200 ml), brine (200 ml), dried (MgSO4) and evaporated to dryness. Column chromatography on silica gel eluting with chloroformmethanol (100:1) afforded the title compound (11.20 g, 49%). IR: νmax (KBr) 3070, 1800, 1740, 1730, 1605, 1585, 1450 and 1410 cm-1 ; 1H NMR δH [(CD3)2SO] 5.70(2H, s, CH2Ph), 7.55(5H, s, CH2Ph), 8.20(4H, s, Ar), 8.95(1H, s, H-2), 9.25(1H, s, H-8). Found: C, 64.71; H, 3.78; N, 18.85%; m/z 371.1025. C20H13N5O3 requires: C, 64.68; H, 3.54; N, 18.86%; m/e 371.1018.

Workup

  1. customAfter 1 hour at room temperature the solvent was removed under reduced pressure
  2. customthe residue partitioned between chloroform (500 ml) and saturated potassium bicarbonate (300 ml)
  3. customThe organic phase was separated
  4. washwashed with water (200 ml), brine (200 ml)
  5. dry with materialdried (MgSO4)
  6. customevaporated to dryness

Sources & evidence

ORD record
ord-9d6d039efa9945a3beb94d8cc151e292
Source dataset
uspto-grants-1993_09
Patent number
US05247085

Linked notes

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