Triphenylphosphine → Dibenzyl azodicarboxylate

HRID 1097652

Reaction equation

HRID 1097652 reaction equation
[Cl:1][C:2]1[N:10](CC=C)[C:9]2[C:8](=[O:14])[NH:7][C:6](=[O:15])[N:5]([CH2:16][CH2:17][CH2:18][CH2:19][CH3:20])[C:4]=2[N:3]=1.[Cl:21][C:22]1[CH:27]=[CH:26][C:25]([CH2:28][C:29]2[N:33]=[C:32]([CH2:34][CH2:35][CH2:36]O)[O:31][N:30]=2)=[CH:24][CH:23]=1.C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.[CH:57]1[CH:62]=[CH:61][C:60]([CH2:63][O:64][C:65](/[N:67]=[N:68]/[C:69]([O:71][CH2:72][C:73]2[CH:78]=[CH:77][CH:76]=[CH:75][CH:74]=2)=[O:70])=[O:66])=[CH:59][CH:58]=1>C1COCC1>[Cl:1][C:2]1[NH:10][C:9]2[C:8](=[O:14])[N:7]([CH2:36][CH2:35][CH2:34][C:32]3[O:31][N:30]=[C:29]([CH2:28][C:25]4[CH:24]=[CH:23][C:22]([Cl:21])=[CH:27][CH:26]=4)[N:33]=3)[C:6](=[O:15])[N:5]([CH2:16][CH2:17][CH2:18][CH2:19][CH3:20])[C:4]=2[N:3]=1.[CH:76]1[CH:75]=[CH:74][C:73]([CH2:72][O:71][C:69](/[N:68]=[N:67]/[C:65]([O:64][CH2:63][C:60]2[CH:61]=[CH:62][CH:57]=[CH:58][CH:59]=2)=[O:66])=[O:70])=[CH:78][CH:77]=1

Participants

7

Reactant 4

HCID 11776TriphenylphosphineHCID 5387121Dibenzyl azodicarboxylateHCID 592995577-Allyl-8-chloro-3-pentyl-1H-purine-2,6(3H,7H)-dioneHCID 668129393-{3-[(4-Chlorophenyl)methyl]-1,2,4-oxadiazol-5-yl}-1-propanol

Product 2

HCID 5387121Dibenzyl azodicarboxylateYield 177.5%HCID 593955258-Chloro-1-(3-{3-[(4-chlorophenyl)methyl]-1,2,4-oxadiazol-5-yl}propyl)-3-pentyl-3,7-dihydro-1H-purine-2,6-dione

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent

Procedure

To a solution of 8-chloro-3-pentyl-7-(2-propen-1-yl)-3,7-dihydro-1H-purine-2,6-dione (0.10 g, 0.34 mmol), 3-{3-[(4-chlorophenyl)methyl]-1,2,4-oxadiazol-5-yl}-1-propanol (0.086 g, 0.34 mmol) and triphenylphosphine (0.186 g, 0.69 mmol) in THF (5 ml) was added dibenzylazodicarboxylate (0.204 g, 0.68 mmol) and the solution stirred for 18 h. The solution was then concentrated and the residues chromatographed over silica (20 g, SPE) eluting with DCM initially then DCM/Et2O mixtures to yield the title compound contaminated with dibenzylazodicarboxylate by-products (0.18 g). Material used crude in deprotection step.

Workup

  1. concentrationThe solution was then concentrated
  2. customthe residues chromatographed over silica (20 g, SPE)
  3. washeluting with DCM initially

Sources & evidence

ORD record
ord-981292021ff24f748c5004279100e538
Source dataset
uspto-grants-2012_03
Patent number
US08143264B2

Linked notes

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