Trifluoroacetic acid → (2S)-(2R,3S,4R,5R)-2-((((((2R,3S,5R)-5-(4-amino-2-oxopyrimidin-1(2H)-yl)-2-((phosphonooxy)methyl)tetrahydrofuran-3-yl)oxy)(hydroxy)phosphoryl)oxy)methyl)-5-(6-amino-9H-purin-9-yl)-4-hydroxytetrahydrofuran-3-yl 2-amino-5-((((2-azidobenzyl)oxy)carbonyl)amino)pentanoate

HRID 1482356Notes

Reaction equation

HRID 1482356 reaction equation
FC(F)(F)C(O)=O.[N:8]([C:11]1[CH:77]=[CH:76][CH:75]=[CH:74][C:12]=1[CH2:13][O:14][C:15]([NH:17][CH2:18][CH2:19][CH2:20][C@@H:21]([NH:66]C(OC(C)(C)C)=O)[C:22]([O:24][C@H:25]1[C@@H:29]([OH:30])[C@H:28]([N:31]2[CH:39]=[N:38][C:37]3[C:32]2=[N:33][CH:34]=[N:35][C:36]=3[NH2:40])[O:27][C@H:26]1[CH2:41][O:42][P:43]([O:46][C@H:47]1[CH2:51][C@H:50]([N:52]2[CH:57]=[CH:56][C:55]([NH2:58])=[N:54][C:53]2=[O:59])[O:49][C@@H:48]1[CH2:60][O:61][P:62]([OH:65])([OH:64])=[O:63])([OH:45])=[O:44])=[O:23])=[O:16])=[N+:9]=[N-:10]>ClCCl>[NH2:66][C@H:21]([CH2:20][CH2:19][CH2:18][NH:17][C:15]([O:14][CH2:13][C:12]1[CH:74]=[CH:75][CH:76]=[CH:77][C:11]=1[N:8]=[N+:9]=[N-:10])=[O:16])[C:22]([O:24][C@H:25]1[C@@H:29]([OH:30])[C@H:28]([N:31]2[CH:39]=[N:38][C:37]3[C:32]2=[N:33][CH:34]=[N:35][C:36]=3[NH2:40])[O:27][C@H:26]1[CH2:41][O:42][P:43]([O:46][C@H:47]1[CH2:51][C@H:50]([N:52]2[CH:57]=[CH:56][C:55]([NH2:58])=[N:54][C:53]2=[O:59])[O:49][C@@H:48]1[CH2:60][O:61][P:62]([OH:65])([OH:64])=[O:63])([OH:45])=[O:44])=[O:23]

Participants

4

Reactant 2

HCID 6422Trifluoroacetic acidHCID 117735836(2S)-(2R,3S,4R,5R)-2-((((((2R,35,5R)-5-(4-amino-2-oxopyrimidin-1(2H)-yl)-2-((phosphonooxy)methyl)tetrahydrofuran-3-yl)oxy)(hydroxy)phosphoryl)oxy)methyl)-5-(6-amino-9H-purin-9-yl)-4-hydroxytetrahydrofuran-3-yl 5-((((2-azidobenzyl)oxy)carbonyl)amino)-2-((tert-butoxycarbonyl)amino)pentanoate

Product 1

HCID 117736633(2S)-(2R,3S,4R,5R)-2-((((((2R,3S,5R)-5-(4-amino-2-oxopyrimidin-1(2H)-yl)-2-((phosphonooxy)methyl)tetrahydrofuran-3-yl)oxy)(hydroxy)phosphoryl)oxy)methyl)-5-(6-amino-9H-purin-9-yl)-4-hydroxytetrahydrofuran-3-yl 2-amino-5-((((2-azidobenzyl)oxy)carbonyl)amino)pentanoateYield 93%

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent2×

Procedure

A 10% solution of trifluoroacetic acid in dichloromethane (0.45 mL) was added to a solution of (2S)-(2R,3S,4R,5R)-2-((((((2R,35,5R)-5-(4-amino-2-oxopyrimidin-1(2H)-yl)-2-((phosphonooxy)methyl)tetrahydrofuran-3-yl)oxy)(hydroxy)phosphoryl)oxy)methyl)-5-(6-amino-9H-purin-9-yl)-4-hydroxytetrahydrofuran-3-yl 5-((((2-azidobenzyl)oxy)carbonyl)amino)-2-((tert-butoxycarbonyl)amino)pentanoate (Compound tk63) (51 mg, 0.050 mmol) in dichloromethane (0.45 mL), and the mixture was stirred at room temperature for 45 minutes. Following concentration under reduced pressure, the resulting residue was purified by reverse-phase silica gel column chromatography (0.05% aqueous trifluoroacetic acid solution/0.05% trifluoroacetic acid-acetonitrile solution) to afford (2S)-(2R,3S,4R,5R)-2-((((((2R,3S,5R)-5-(4-amino-2-oxopyrimidin-1(2H)-yl)-2-((phosphonooxy)methyl)tetrahydrofuran-3-yl)oxy)(hydroxy)phosphoryl)oxy)methyl)-5-(6-amino-9H-purin-9-yl)-4-hydroxytetrahydrofuran-3-yl 2-amino-5-((((2-azidobenzyl)oxy)carbonyl)amino)pentanoate (Orn(oAcbz)-pdCpA) (Compound tk64) (42.6 mg, 93%).

Workup

  1. concentrationconcentration under reduced pressure
  2. customthe resulting residue was purified by reverse-phase silica gel column chromatography (0.05% aqueous trifluoroacetic acid solution/0.05% trifluoroacetic acid-acetonitrile solution)

Sources & evidence

ORD record
ord-ffc340bbfb8d499a880df0b35537eb27
Source dataset
uspto-grants-2016_08
Patent number
US09409952B2

Reaction notes

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