Lithium Hydroxide → HCID 67224573, Verbindung

A mixture of 0.107 g of 2-methyl-4-(4-trifluoromethyl-benzyl)-4H-thieno[3,2-b]pyrrole-3-carboxylic acid, 0.150 g of (S)-4-(1-amino-ethyl)-benzoic acid methyl ester, 0.100 g of HOBT-hydrate, 0.133 g of ethyl-dimethylaminopropyl-carbodiimide hydrochloride (EDCI) and 0.150 ml of N-methylmorpholine in 4 ml of DMF was stirred at room temperature for 18 h. The reaction was then quenched with 2 ml of water and 5 ml of sat. NaHCO3 solution. The resulting mixture extracted with 20 ml of EtOAc. The organic layer was dried over Na2SO4, filtered, and concentrated to give the crude methyl ester which was dissolved in 4 ml THF, 4 mL MeOH and 1 mL water and treated with 1 mL of 1N LiOH solution. After stirring for 24 h at room temperature, the reaction mixture was concentrated under reduced pressure to remove THF and MeOH. The residue was diluted with 4 mL of water and treated with 0.7 mL of AcOH with vigorous stirring. After stirring for 2 h, the solid was collected by filtration and air-dried to give 0.110 g of the title compound as a white powder.

1. customThe reaction was then quenched with 2 ml of water and 5 ml of sat. NaHCO3 solution
2. extractionThe resulting mixture extracted with 20 ml of EtOAc
3. dry with materialThe organic layer was dried over Na2SO4
4. filtrationfiltered
5. concentrationconcentrated
6. customto give the crude methyl ester which
7. stirringAfter stirring for 24 h at room temperature
8. concentrationthe reaction mixture was concentrated under reduced pressure
9. customto remove THF and MeOH
10. additionThe residue was diluted with 4 mL of water
11. additiontreated with 0.7 mL of AcOH with vigorous stirring
12. stirringAfter stirring for 2 h
13. filtrationthe solid was collected by filtration
14. customair-dried

ORD-Eintrag

ord-79e1f821b402465982714ad689290c2c

Quelldatensatz

uspto-grants-2013_03

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US08404736B2