반응 #811055

반응 방정식

(5R)-3-(3,4-dihydro-4-methyl-3-oxo-2H-1,4-benzoxazin-7-yl)-2-oxo-oxazolidine-5-carboxylic acid methyl ester

(5R)-3-(3,4-dihydro-4-methyl-3-oxo-2H-1,4-benzoxazin-7-yl)-2-oxo-5-oxazolidinecarboxamide

FCH2CH2NH2.HCl

triethylamine

→

title compound

수율 69.8%

(5R)-N-(2-Fluoroethyl)-3-(3,4-dihydro-4-methyl-3-oxo-2H-1,4-benzoxazin-7-yl)-2-oxo-5-oxazolidinecarboxamide

수율 69.8%

용매

MeOH

반응 조건

후처리

1. 1
   농축The reaction mixture is then concentrated to dryness under reduced pressure
2. 2
   기타the residue is purified by silica gel column chromatography (eluent: EtOAc)

실험 절차

To a stirred suspension of (5R)-3-(3,4-dihydro-4-methyl-3-oxo-2H-1,4-benzoxazin-7-yl)-2-oxo-oxazolidine-5-carboxylic acid methyl ester (EXAMPLE 59, Step 3, 200 mg, 0.65 mmol) in MeOH (7.5 mL) is added FCH2CH2NH2.HCl (325 mg, 3.25 mmol). To this resulting suspension is added triethylamine (453 μL, 3.25 mmol), and the solution is heated to 55° C. for 5 h followed by stirring for 16 h at room temperature. The reaction mixture is then concentrated to dryness under reduced pressure and the residue is purified by silica gel column chromatography (eluent: EtOAc) to give the title compound (153 mg, 63%); 1H NMR (300 MHz, DMSO) δ 8.68 (br t, 1H), 7.30 (d, 1H), 7.22–7.14 (m, 2H), 5.08 (dd, 1H), 4.65 (s, 2H), 4.54 (dd, 1H), 4.38 (t, 1H), 4.26 (t, 1H), 3.45 (s, 3H), 3.96 (dd, 1H), 3.50–3.35 (m, 5H); MS for C15H16FN3O5 m/z 338.5 (M+H)+.

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