Piperazine → (2S,4S)-1-BOC-4-[acetyl(4,4-dimethylcyclohexyl)amino]-2-(piperazin-1-ylcarbonyl)pyrrolidine

(4S)-1-BOC-4-[acetyl(4,4-dimethylcyclohexyl)amino]-L-proline (0.92 g, 2.41 mmol) obtained in Step C of Example 1, was dissolved in DMF (10 mL) and DIPEA (1.05 mL, 6.01 mmol) was added thereto. Piperazine (0.25 g, 2.89 mmol) and HBTU (0.91 g, 2.41 mmol) were also added thereto in order. After the reaction solution was stirred at room temperature for 2 hours, the solution was concentrated in vacuo. The residue was diluted with EtOAc and washed with saturated NaHCO3 aqueous solution. The extracted organic solution was dried over MgSO4, concentrated in vacuo. The residue was purified by column chromatography (eluent: MC/MeOH=10/1) to give the title compound (1.01 g, 93%).

1. concentrationthe solution was concentrated in vacuo
2. additionThe residue was diluted with EtOAc
3. washwashed with saturated NaHCO3 aqueous solution
4. dry with materialThe extracted organic solution was dried over MgSO4
5. concentrationconcentrated in vacuo
6. customThe residue was purified by column chromatography (eluent: MC/MeOH=10/1)

ORDレコード

ord-3fbccfc76ea8423c9ecde4b3c37165b1

出典データセット

uspto-grants-2012_08

DOI

10.6084/m9.figshare.5104873.v1

特許番号

US08236955B2