Potassium Hydroxide → HCID 68647003, compound

HRID 1162725Notes

Reaction equation

[C:1]([O:5][C:6]([N:8]1[CH2:12][CH:11]([CH:13]2[CH2:15][CH2:14]2)[CH:10](C(O)=O)[CH2:9]1)=[O:7])([CH3:4])([CH3:3])[CH3:2].C1(P([N:33]=[N+]=[N-])(C2C=CC=CC=2)=O)C=CC=CC=1.C(N(C(C)C)C(C)C)C.[OH-].[K+]>O1CCOCC1>[C:1]([O:5][C:6]([N:8]1[CH2:12][CH:11]([CH:13]2[CH2:15][CH2:14]2)[CH:10]([NH2:33])[CH2:9]1)=[O:7])([CH3:4])([CH3:3])[CH3:2]

Participants

Conditions

Temperature: 80 °C

Procedure

101.5 To a stirred solution of 200 mg (3RS,4RS)-4-cyclopropyl-pyrrolidine-1,3-dicarboxylic acid 1-tert-butyl ester at 80° C. in 2 ml dioxane under an argon atmosphere were added 0.20 ml diphenylphosphoryl azide and 0.16 ml N-ethyldiisopropylamine. Stirring at 80° C. was continued for 4 hrs. Then, the hot mixture was poured onto 15 ml 1 N KOH and the product was extracted with EtOAc. The aqueous phase was back extracted with EtOAc. The combined organics were washed with H2O and brine, dried over MgSO4, filtered and concentrated. The crude product was purified by column chromatography (silica gel; gradient: CH2Cl2->CH2Cl2/MeOH 9:1) to give 34 mg (3RS,4SR)-3-amino-4-cyclopropyl-pyrrolidine-1-carboxylic acid tert-butyl ester as light brown gum. MS 227.3 ([M+H]+)

Workup

extractionthe product was extracted with EtOAc
extractionThe aqueous phase was back extracted with EtOAc
washThe combined organics were washed with H2O and brine
dry with materialdried over MgSO4
filtrationfiltered
concentrationconcentrated
customThe crude product was purified by column chromatography (silica gel; gradient: CH2Cl2->CH2Cl2/MeOH 9:1)

Sources & evidence

ORD record: ord-98c372525607423e84885757efd00361
Source dataset: uspto-grants-2010_10
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US07820699B2

Reaction notes

Loading…