Sodium Carbonate → tert-butyl (S)-2-(4-chlorophenyl)-3-(4-((R)-5-methyl-6,7-dihydro-5H-cyclopenta[d]pyrimidin-4-yl)piperazin-1-yl)-3-oxopropylcarbamate

HBTU (0.033 g, 0.086 mmol) was added to a solution of (R)-5-methyl-4-(piperazin-1-yl)-6,7-dihydro-5H-cyclopenta[d]pyrimidine dihydrochloride (0.025 g, 0.086 mmol), (S)-3-(tert-butoxycarbonylamino)-2-(4-chlorophenyl)propanoic acid (0.026 g, 0.086 mmol), and DIEA (0.045 mL, 0.26 mmol) in DCM (1.2 mL). The reaction mixture was stirred at room temperature for 90 minutes. 2M Na2CO3 was added, and the mixture was extracted with DCM. The combined extracts were dried (Na2SO4), filtered, and concentrated. The crude was flashed on Biotage 12S (ca. 100 mL; 4:1 DCM:EA flushed to elute DIEA, then 1:9 DCM:EA eluted product) to give tert-butyl (S)-2-(4-chlorophenyl)-3-(4-((R)-5-methyl-6,7-dihydro-5H-cyclopenta[d]pyrimidin-4-yl)piperazin-1-yl)-3-oxopropylcarbamate (0.043 g, 100% yield) as a yellow residue. LC/MS (APCI+) m/z 500.1 [M+H]−; Rf: 2.68.

1. extractionthe mixture was extracted with DCM
2. dry with materialThe combined extracts were dried (Na2SO4)
3. filtrationfiltered
4. concentrationconcentrated
5. custom4:1 DCM:EA flushed
6. washto elute DIEA

ORDレコード

ord-394fe30409d245d39b30798ac837e85e

出典データセット

uspto-grants-2011_08

DOI

10.6084/m9.figshare.5104873.v1

特許番号

US08003651B2