Triethylamine → Ethyl 2-(cyclobutanecarboxamido)-3-mercaptopropanoate

Triethylamine (15 mL) was added to a suspension of cyclobutanecarboxylic acid (2.57 mL) and ethyl 2-amino-3-mercaptopropanoate hydrochloride (5 g) in DMF (40 mL). The resulting mixture was cooled in an ice bath and a solution of T3P (1.57M in THF, 20.6 mL) was added dropwise. The resulting mixture was allowed to warm to RT and stirred overnight. The reaction was quenched with saturated sodium bicarbonate solution (50 mL) and the layers separated. The aqueous phase was extracted with DCM (2×100 mL). The combined organic solutions were washed with brine (100 mL), dried over sodium sulphate, filtered and evaporated. The resulting white solid was purified by silica gel chromatography eluting with 4:1 to 1:1 isohexane:ethyl acetate gradient. The fractions containing product were combined and evaporated to give the subtitled compound as a clear oil. Yield 3.20 g.

1. temperatureThe resulting mixture was cooled in an ice bath
2. customThe reaction was quenched with saturated sodium bicarbonate solution (50 mL)
3. customthe layers separated
4. extractionThe aqueous phase was extracted with DCM (2×100 mL)
5. washThe combined organic solutions were washed with brine (100 mL)
6. dry with materialdried over sodium sulphate
7. filtrationfiltered
8. customevaporated
9. customThe resulting white solid was purified by silica gel chromatography
10. washeluting with 4:1 to 1:1 isohexane
11. additionThe fractions containing product
12. customevaporated

ORD-Eintrag

ord-7bc51379fc2341fa944fc16a1a64dd03

Quelldatensatz

uspto-grants-2012_04

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US08148373B2