Reaktion #1601296

Reaktionsgleichung

((R)-3-Amino-piperidin-1-yl)-[5-(4-methyl-5-trifluoromethyl-isoxazol-3-yl)-thiophen-2-yl]-methanone, hydrochloride

triethylamine

methanesulfonyl chloride

→

product

Ausbeute 70.0%

N-{(R)-1-[5-(4-Methyl-5-trifluoromethyl-isoxazol-3-yl)-thiophene-2-carbonyl]-piperidin-3-yl}-methanesulfonamide

Ausbeute 70.0%

Lösungsmittel

THF

Reaktionsbedingungen

Aufarbeitung

1. 1
   Sonstigeevaporated
2. 2
   Sonstigechromatographed on silica gel with EtOAc as eluant

Vorschrift

A suspension of ((R)-3-Amino-piperidin-1-yl)-[5-(4-methyl-5-trifluoromethyl-isoxazol-3-yl)-thiophen-2-yl]-methanone, hydrochloride (Example 27, 79 mg, 0.2 mmol) in THF (2 mL) was treated with triethylamine (63 μL, 0.45 mmol) followed by methanesulfonyl chloride (19 μL, 0.24 mmol). The reaction mixture was allowed to stir 48 H, evaporated, and chromatographed on silica gel with EtOAc as eluant to afford product as a colorless foam (61 mg, 70%). 1H NMR (CDCl3) 1.68 (m, 2 H), 1.88 (m, 2 H), 2.02 (m, 1 H), 2.33 (d, J=1.8, 3 H), 2.98 (s, 3 H), 3.46 (m, 2 H), 3.57 (m, 1 H), 3.84 (m, 1 H), 4.05 (d, J=12.7, 1 H), 5.45 (d, J=7.5, 1 H), 7.39 (d, J=4.0, 1 H), 7.43 (d, J=3.5, 1 H). 13C NMR 7.9, 23.4, 31.6, 41.9, 47 (br), 52 (br), 49.9, 114.8, 118.7 (q, J=271), 128.2, 129.8, 131.8, 139.6, 155.2 (q, 40), 157.9, 163.5. 19F NMR −63.1. LC/MS 5.82 min, [M+1]+ 438.

Quelle