Piperidine → HCID 11454007, Verbindung

Temperatur

60 °C

Piperidine (30 μL, 2.0 mmol), Pd2dba3 (2.7 mg, 0.003 mmol), potassium t-butoxide (59 mg, 0.53 mmol) and 1,3-bis-(2,6-diisopropylphenyl)-4,5-dihydroimidazol-2-ylidene HCl salt (2.6 mg, 0.006 mmol) are added sequentially to a solution of 3-{[2-(4-chloro-3-trifluoromethyl-phenyl)-benzo[b]thiophen-5-ylmethyl]-amino}-propionic acid tert-butyl ester (72 mg, 0.15 mmol) in 1,4-dioxane (0.8 mL). The mixture is irradiated in a microwave at 100° C. for 1 hour. The reaction is quenched with water and the mixture is concentrated in vacuo. The residue is dissolved in THF and aqueous 2N NaOH (4 mL, 1:1 v/v), and stirred at 60° C. for 3 hours. It is concentrated and purified with preparative LCMS to afford 20 mg of 3-{[2-(4-piperidin-1-yl-3-trifluoromethyl-phenyl)-benzo[b]thiophen-5-ylmethyl]-amino}-propionic acid, which is converted to HCl salt: 1H NMR (400 MHz, CD3OD) δ 8.15-8.00 (m, 4 H), 7.87 (s, 1 H), 7.63 (d, 1 H), 7.57 (d, 1 H), 4.48 (s, 2 H), 3.44 (t, 2 H), 3.03 (t, 4 H), 2.89 (t, 2 H), 1.90-1.80 (m, 4 H), 1.75-1.65 (m, 2 H); MS (ES) 463.4 (M+H+).

1. customThe mixture is irradiated in a microwave at 100° C. for 1 hour
2. customThe reaction is quenched with water
3. concentrationthe mixture is concentrated in vacuo
4. dissolutionThe residue is dissolved in THF
5. concentrationIt is concentrated
6. custompurified with preparative LCMS

ORD-Eintrag

ord-77d29b1db6144d9c80f0d31f468f5ce9

Quelldatensatz

uspto-grants-2008_08

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US07417065B2