Cyclopentanecarbonyl chloride → ethyl (RS)-(4-cyano-phenylamino)-[3-(cyclopentanecarbonyl-amino)-5-ethyl-phenyl]-acetate

Cyclopentanecarbonyl chloride (0.104 ml, 0.85 mmol) was added dropwise at 0° C. to a solution of the ethyl (RS)-(3-amino-5-ethyl-phenyl)-(4-cyano-phenylamino)-acetate (250 mg, 0.772 mmol) obtained in Example 223.4 and diisopropylethylamine (0.146 ml, 0.85 mmol) in CH2Cl2 (5 ml). The reaction mixture was warmed slowly (2 h.) to room temperature. A saturated aqueous solution of KHSO4 was added and the mixture was extracted with EtOAc. The organic phase was washed with H2O, dried and filtered, and the filtrate was concentrated. The residue was purified by chromatography (SiO2, hexane→hexane/EtOAc 2:1). There were obtained 215 mg (66%) of ethyl (RS)-(4-cyano-phenylamino)-[3-(cyclopentanecarbonyl-amino)-5-ethyl-phenyl]-acetate as a colorless foam; MS: 418 ([M−H]−).

1. extractionthe mixture was extracted with EtOAc
2. washThe organic phase was washed with H2O
3. customdried
4. filtrationfiltered
5. concentrationthe filtrate was concentrated
6. customThe residue was purified by chromatography (SiO2, hexane→hexane/EtOAc 2:1)

ORD 기록

ord-dff47c4275864fbc93732457fb004e68

출처 데이터셋

uspto-grants-2002_11

DOI

10.6084/m9.figshare.5104873.v1

특허 번호

US06476264B2