Acetic Acid → 7-(cyclohexylamino)-10a-(4-methoxyphenyl)-1-[(3-methyl-1,2-oxazol-4-yl)carbonyl]-2,3,10,10a-tetrahydro-1H,5H-imidazo[1,2-a]pyrrolo[1,2-d]pyrazin-5-one

HRID 1753178Notes

Reaction equation

HRID 1753178 reaction equation
[NH2:1][C:2]1[CH:3]=[C:4]2[C:9](=[O:10])[N:8]3[CH2:11][CH2:12][N:13]([C:14]([C:16]4[C:17]([CH3:21])=[N:18][O:19][CH:20]=4)=[O:15])[C:7]3([C:22]3[CH:27]=[CH:26][C:25]([O:28][CH3:29])=[CH:24][CH:23]=3)[CH2:6][N:5]2[CH:30]=1.[C:31]1(=O)[CH2:36][CH2:35][CH2:34][CH2:33][CH2:32]1.C(O)(=O)C.C(O[BH-](OC(=O)C)OC(=O)C)(=O)C.[Na+]>C(Cl)Cl>[CH:31]1([NH:1][C:2]2[CH:3]=[C:4]3[C:9](=[O:10])[N:8]4[CH2:11][CH2:12][N:13]([C:14]([C:16]5[C:17]([CH3:21])=[N:18][O:19][CH:20]=5)=[O:15])[C:7]4([C:22]4[CH:27]=[CH:26][C:25]([O:28][CH3:29])=[CH:24][CH:23]=4)[CH2:6][N:5]3[CH:30]=2)[CH2:36][CH2:35][CH2:34][CH2:33][CH2:32]1

Participants

6

Reactant 4

HCID 176Acetic Acid2×HCID 7967Cyclohexanone2×HCID 5049666Sodium triacetoxyborohydrideHCID 533733037-amino-10a-(4-methoxyphenyl)-1-[(3-methyl-1,2-oxazol-4-yl)carbonyl]-2,3,10,10a-tetrahydro-1H,5H-imidazo[1,2-a]pyrrolo[1,2-d]-pyrazin-5-one

Product 1

HCID 584063677-(cyclohexylamino)-10a-(4-methoxyphenyl)-1-[(3-methyl-1,2-oxazol-4-yl)carbonyl]-2,3,10,10a-tetrahydro-1H,5H-imidazo[1,2-a]pyrrolo[1,2-d]pyrazin-5-one

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent

Procedure

To a solution of 7-amino-10a-(4-methoxyphenyl)-1-[(3-methyl-1,2-oxazol-4-yl)carbonyl]-2,3,10,10a-tetrahydro-1H,5H-imidazo[1,2-a]pyrrolo[1,2-d]-pyrazin-5-one (33 mg, 0.081 mmol) in CH2Cl2 (0.5 mL) was added cyclohexanone (9 μL, 0.081 mmol), acetic acid (7 μL, 0.12 mmol) followed by sodium triacetoxyborohydride (26 mg, 0.12 mmol). After stirring the mixture for three further hours, cyclohexanone (20 μL, 0.18 mmol) was added followed by the addition of additional acetic acid (20 μL, 0.34 mmol). The mixture was quenched with a saturated aqueous solution of NaHCO3. Additional CH2Cl2 (3 mL) was added and the organic layer separated, the aqueous layer was further extracted with CH2Cl2 (3 mL). The organic layers were combined dried (Na2SO4), filtrated, concentrated in vacuo to give a residue that was purified by flash chromatography (Biotage SP4, gradient 0-10% MeOH in EtOAc) and reverse phase chromatography (Biotage SP4, 12 g C18 cartridge; gradient ACN in water). The compound 7-(cyclohexylamino)-10a-(4-methoxyphenyl)-1-[(3-methyl-1,2-oxazol-4-yl)carbonyl]-2,3,10,10a-tetrahydro-1H,5H-imidazo[1,2-a]pyrrolo[1,2-d]pyrazin-5-one (112) was isolated as a solid (1.6 mg, yield 1%).

Workup

  1. additionwas added
  2. customThe mixture was quenched with a saturated aqueous solution of NaHCO3
  3. additionAdditional CH2Cl2 (3 mL) was added
  4. customthe organic layer separated
  5. extractionthe aqueous layer was further extracted with CH2Cl2 (3 mL)
  6. dry with materialThe organic layers were combined dried (Na2SO4)
  7. filtrationfiltrated
  8. concentrationconcentrated in vacuo
  9. customto give a residue that
  10. customwas purified by flash chromatography (Biotage SP4, gradient 0-10% MeOH in EtOAc)

Sources & evidence

ORD record
ord-f305975d334a40c6863c6da5f6352453
Source dataset
uspto-grants-2015_10
Patent number
US09163029B2

Reaction notes

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