Pyrrolidine → HCID 57571228, compound

HRID 2065852Notes

Reaction equation

[C:1]([NH:8][C@H:9]([C:17]([OH:19])=O)[CH2:10][C:11]1[CH:16]=[CH:15][N:14]=[CH:13][CH:12]=1)([O:3][C:4]([CH3:7])([CH3:6])[CH3:5])=[O:2].CC[N:22]([CH:26]([CH3:28])C)[CH:23]([CH3:25])C.ClC(OCC(C)C)=O.N1CCCC1>C(Cl)Cl>[O:19]=[C:17]([N:22]1[CH2:23][CH2:25][CH2:28][CH2:26]1)[C@H:9]([NH:8][C:1](=[O:2])[O:3][C:4]([CH3:5])([CH3:6])[CH3:7])[CH2:10][C:11]1[CH:12]=[CH:13][N:14]=[CH:15][CH:16]=1

Participants

Conditions

Temperature: 0 °C

Procedure

N-Boc-(S)-3-(pyridin-4-yl)alanine (0.500 g, 1.88 mmol) was dissolved in CH2Cl2 (15 mL) and DIEA (361 μL, 2.07 mmol) was added. The mixture was cooled to 0° C. and isobutyl chloroformate (270 μL, 2.07 mmol) was added. The mixture was stirred for 10 min and pyrrolidine (267 mg, 3.76 mmol) in CH2Cl2 (5 mL) was added. This mixture was stirred for 15 min at 4° C., 12 h at 25° C., washed successively with NaH2PO4, saturated sodium hydrogen carbonate, water and brine. The organic layer was dried over magnesium sulfate and evaporated to dryness. The residue obtained was purify by column chromatography (SiO2) using a gradient of MeOH 0-10% [v/v] in EtOAc to give tert-butyl (R)-1-oxo-3-(pyridin-4-yl)-1-(pyrrolidin-1-yl)propan-2-ylcarbamate EBE 06172 (146 mg, 24% yield) as a white solid.

Workup

stirringThis mixture was stirred for 15 min at 4° C., 12 h at 25° C.
washwashed successively with NaH2PO4, saturated sodium hydrogen carbonate, water and brine
dry with materialThe organic layer was dried over magnesium sulfate
customevaporated to dryness
customThe residue obtained
customwas purify by column chromatography (SiO2)

Sources & evidence

ORD record: ord-a75182c0d5ba4584a709a996ee5370ef
Source dataset: uspto-grants-2012_10
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08288556B2

Reaction notes

Loading…