Dichloromethane → {(3R,6R)-3-(2,3-dihydro-1H-inden-2-yl)-6-[(1S)-1-methylpropyl]-2,5-dioxo-1-piperazinyl}(2,6-dimethyl-3-pyridinyl)acetic acid hydrochloride

HRID 402853Notes

Reaction equation

HRID 402853 reaction equation
[CH2:1]1[C:9]2[C:4](=[CH:5][CH:6]=[CH:7][CH:8]=2)[CH2:3][CH:2]1[C@H:10]1[NH:15][C:14](=[O:16])[C@@H:13]([C@@H:17]([CH3:20])[CH2:18][CH3:19])[N:12]([CH:21]([C:32]2[C:33]([CH3:39])=[N:34][C:35]([CH3:38])=[CH:36][CH:37]=2)[C:22](NC2C=CC=CC=2O)=[O:23])[C:11]1=[O:40].C(N1C=CN=C1)(N1C=CN=C1)=[O:42].[Cl:53]CCl>>[ClH:53].[CH2:3]1[C:4]2[C:9](=[CH:8][CH:7]=[CH:6][CH:5]=2)[CH2:1][CH:2]1[C@H:10]1[NH:15][C:14](=[O:16])[C@@H:13]([C@@H:17]([CH3:20])[CH2:18][CH3:19])[N:12]([CH:21]([C:32]2[C:33]([CH3:39])=[N:34][C:35]([CH3:38])=[CH:36][CH:37]=2)[C:22]([OH:42])=[O:23])[C:11]1=[O:40]

Participants

4

Reactant 3

HCID 6344DichloromethaneHCID 682631,1'-CarbonyldiimidazoleHCID 569495922-{(3R,6R)-3-(2,3-dihydro-1H-inden-2-yl)-6-[(1S)-1-methylpropyl]-2,5-dioxo-1-piperazinyl}-2-(2,6-dimethyl-3-pyridinyl)-N-(2-hydroxyphenyl)acetamide2×

Product 1

HCID 56949593{(3R,6R)-3-(2,3-dihydro-1H-inden-2-yl)-6-[(1S)-1-methylpropyl]-2,5-dioxo-1-piperazinyl}(2,6-dimethyl-3-pyridinyl)acetic acid hydrochlorideYield 56%

Procedure

2-{(3R,6R)-3-(2,3-dihydro-1H-inden-2-yl)-6-[(1S)-1-methylpropyl]-2,5-dioxo-1-piperazinyl}-2-(2,6-dimethyl-3-pyridinyl)-N-(2-hydroxyphenyl)acetamide (24.25 g, 45 mmol) (intermediate 2) and 1,1′-carbonyldiimidazole (11.7 g, 72 mmol) were dissolved in dry dichloromethane (200 ml) and left to stand under nitrogen for 20 hours. The solvent was removed in vacuo and the residue was dissolved in acetone (200 ml) and 2N hydrochloric acid (20 ml). After stirring for 20 hours the solvent was removed in vacuo and the residue was dissolved in methanol (50 ml). The solution was applied to an aminopropyl cartridge (2×70 g) and eluted with methanol (250 ml) and then 10% acetic acid in methanol (250 ml). The required fractions were combined and evaporated in vacuo. The residue was treated with 2N hydrochloric acid and the resulting solution evaporated in vacuo to give the title compound {(3R,6R)-3-(2,3-dihydro-1H-inden-2-yl)-6-[(1S)-1-methylpropyl]-2,5-dioxo-1-piperazinyl}(2,6-dimethyl-3-pyridinyl)acetic acid hydrochloride as a tan solid (12.21 g, 56%).

Workup

  1. waitleft
  2. customThe solvent was removed in vacuo
  3. dissolutionthe residue was dissolved in acetone (200 ml)
  4. customwas removed in vacuo
  5. dissolutionthe residue was dissolved in methanol (50 ml)
  6. washeluted with methanol (250 ml)
  7. customevaporated in vacuo
  8. additionThe residue was treated with 2N hydrochloric acid
  9. customthe resulting solution evaporated in vacuo

Sources & evidence

ORD record
ord-5f176c3bd6f948bc83270578fc3823ff
Source dataset
uspto-grants-2014_06
Patent number
US08742099B2

Reaction notes

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