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-6-((R)-2-amino-3-(tert-butyldisulfanyl)propanamido)hexanoate

HRID 1482316Notes

Reaction equation

HRID 1482316 reaction equation
FC(F)(F)C(O)=O.C(OC([NH:15][C@H:16]([CH2:61][CH2:62][CH2:63][CH2:64][NH:65][C:66](=[O:83])[C@@H:67]([NH:75]C(OC(C)(C)C)=O)[CH2:68][S:69][S:70][C:71]([CH3:74])([CH3:73])[CH3:72])[C:17]([O:19][C@H:20]1[C@@H:24]([OH:25])[C@H:23]([N:26]2[CH:34]=[N:33][C:32]3[C:27]2=[N:28][CH:29]=[N:30][C:31]=3[NH2:35])[O:22][C@H:21]1[CH2:36][O:37][P:38]([O:41][C@H:42]1[CH2:46][C@H:45]([N:47]2[CH:52]=[CH:51][C:50]([NH2:53])=[N:49][C:48]2=[O:54])[O:44][C@@H:43]1[CH2:55][O:56][P:57]([OH:60])([OH:59])=[O:58])([OH:40])=[O:39])=[O:18])=O)(C)(C)C>ClCCl>[NH2:15][C@H:16]([CH2:61][CH2:62][CH2:63][CH2:64][NH:65][C:66](=[O:83])[C@@H:67]([NH2:75])[CH2:68][S:69][S:70][C:71]([CH3:72])([CH3:73])[CH3:74])[C:17]([O:19][C@H:20]1[C@@H:24]([OH:25])[C@H:23]([N:26]2[CH:34]=[N:33][C:32]3[C:27]2=[N:28][CH:29]=[N:30][C:31]=3[NH2:35])[O:22][C@H:21]1[CH2:36][O:37][P:38]([O:41][C@H:42]1[CH2:46][C@H:45]([N:47]2[CH:52]=[CH:51][C:50]([NH2:53])=[N:49][C:48]2=[O:54])[O:44][C@@H:43]1[CH2:55][O:56][P:57]([OH:60])([OH:59])=[O:58])([OH:40])=[O:39])=[O:18]

Participants

4

Reactant 2

HCID 6422Trifluoroacetic acidHCID 117735912(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-((tert-butoxycarbonyl)amino)-6-((R)-2-((tert-butoxycarbonyl)amino)-3-(tert-butyldisulfanyl)propanamido)hexanoate2×

Product 1

HCID 117735910(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-6-((R)-2-amino-3-(tert-butyldisulfanyl)propanamido)hexanoateYield 94%

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent

Procedure

Trifluoroacetic acid (0.1 mL) was added to a solution of (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-((tert-butoxycarbonyl)amino)-6-((R)-2-((tert-butoxycarbonyl)amino)-3-(tert-butyldisulfanyl)propanamido)hexanoate (Compound 55) (12 mg, 10.38 μmol) in dichloromethane (0.4 mL) at room temperature, and the mixture was stirred at the same temperature for 15 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-6-((R)-2-amino-3-(tert-butyldisulfanyl)propanamido)hexanoate (Lys(Cys(StBu))-pdCpA) (Compound 48) (9.3 mg, 94%).

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-28f931cca7984880b926bead500df28c
Source dataset
uspto-grants-2016_08
Patent number
US09409952B2

Reaction notes

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