Dicyclohexylcarbodiimide → tert-butyl 4-{3-[(3R)-3-{[(2,5-dioxopyrrolidin-1-yl)oxy]carbonyl}piperidin-1-yl]-3-oxopropyl}piperidine-1-carboxylate

HRID 526331Notes

Reaction equation

HRID 526331 reaction equation
[C:1]([O:5][C:6]([N:8]1[CH2:13][CH2:12][CH:11]([CH2:14][CH2:15][C:16]([N:18]2[CH2:23][CH2:22][CH2:21][C@@H:20]([C:24]([OH:26])=[O:25])[CH2:19]2)=[O:17])[CH2:10][CH2:9]1)=[O:7])([CH3:4])([CH3:3])[CH3:2].O[N:28]1[C:32](=[O:33])[CH2:31][CH2:30][C:29]1=[O:34].C1(N=C=NC2CCCCC2)CCCCC1>COCCOC>[O:34]=[C:29]1[CH2:30][CH2:31][C:32](=[O:33])[N:28]1[O:25][C:24]([C@@H:20]1[CH2:21][CH2:22][CH2:23][N:18]([C:16](=[O:17])[CH2:15][CH2:14][CH:11]2[CH2:10][CH2:9][N:8]([C:6]([O:5][C:1]([CH3:4])([CH3:2])[CH3:3])=[O:7])[CH2:13][CH2:12]2)[CH2:19]1)=[O:26]

Participants

5

Reactant 3

HCID 10868DicyclohexylcarbodiimideHCID 80170N-HydroxysuccinimideHCID 54408184(R)-1-(3-(1-tert-butoxycarbonyl-4-piperidyl)propionyl]-3-piperidinecarboxylic acid

Product 1

HCID 89407588tert-butyl 4-{3-[(3R)-3-{[(2,5-dioxopyrrolidin-1-yl)oxy]carbonyl}piperidin-1-yl]-3-oxopropyl}piperidine-1-carboxylateYield 108.2%

Reagents, catalysts & solvents 1

HCID 80711,2-DimethoxyethaneSolvent

Procedure

To (3R)-1-{3-[1-(tert-butoxycarbonyl)piperidin-4-yl]propanoyl}piperidine-3-carboxylic acid (1.91 g, 5.18 mmol) in 1,2-dimethoxyethane (13.5 mL) was added N-hydroxysuccinimide (0.60 g, 5.18 mmol) and 1,3-dicyclohexyl carbodiimide (1.18 g, 5.7 mmol). The solution was stirred for 4 hours at room temperature while a precipitate formed. The mixture was then cooled to 0° C. filtrated and the solid washed with diethyl ether. The filtrate and the diethyl ether wash were combined and concentrated to yield 2.61 g of raw tert-butyl 4-{3-[(3R)-3-{[(2,5-dioxopyrrolidin-1-yl)oxy]carbonyl}piperidin-1-yl]-3-oxopropyl}piperidine-1-carboxylate.

Workup

  1. customformed
  2. temperatureThe mixture was then cooled to 0° C.
  3. filtrationfiltrated
  4. washthe solid washed with diethyl ether
  5. washThe filtrate and the diethyl ether wash
  6. concentrationconcentrated

Sources & evidence

ORD record
ord-adb28364ebdc4846b7176f256925dc5b
Source dataset
uspto-grants-2016_05
Patent number
US09345793B2

Reaction notes

Loading…