Reaktion #68142

Reaktionsgleichung

1-(2-(4-((tert-butoxycarbonyl) (2,3-dihydro-1,4-benzodioxin-6-ylmethyl)amino)piperidin-1-yl)ethyl)-7-methoxy-2-oxo-1,2-dihydroquinoline-5-carboxylic acid

methylamine hydrochloride

(benzotriazol-1-yloxy)tripyrrolidinophosphonium hexafluorophosphate

N,N-diisopropylethylamine

→

tert-butyl (2,3-dihydro-1,4-benzodioxin-6-ylmethyl)(1-(2-(7-methoxy-5-((methylamino)carbonyl)-2-oxoquinolin-1(2H)-yl)ethyl)piperidin-4-yl)carbamate

Ausbeute 84.7%

Lösungsmittel

N,N-dimethylformamide

water

Reaktionsbedingungen

Aufarbeitung

1. 1
   Extraktionextracted with a mixture of ethyl acetate
2. 2
   WaschenThe organic layer was washed sequentially with water and aqueous saturated sodium chloride solution
3. 3
   Trocknendried over anhydrous magnesium sulfate
4. 4
   Sonstigethe solvent was removed under reduced pressure
5. 5
   SonstigeThe residue thus obtained
6. 6
   Sonstigewas purified by silica gel column chromatography [Silica Gel; Kanto Chemical Co., Inc., Silica Gel 60, eluent; chloroform:methanol=20:1]

Vorschrift

463 mg of 1-(2-(4-((tert-butoxycarbonyl) (2,3-dihydro-1,4-benzodioxin-6-ylmethyl)amino)piperidin-1-yl)ethyl)-7-methoxy-2-oxo-1,2-dihydroquinoline-5-carboxylic acid and 144 mg of methylamine hydrochloride were dissolved in 10 mL of N,N-dimethylformamide. To the mixture, 706 mg of (benzotriazol-1-yloxy)tripyrrolidinophosphonium hexafluorophosphate and 0.47 mL of N,N-diisopropylethylamine were added and stirred at room temperature overnight. The reaction mixture was poured into water, and extracted with a mixture of ethyl acetate: toluene=5:1. The organic layer was washed sequentially with water and aqueous saturated sodium chloride solution, dried over anhydrous magnesium sulfate, and the solvent was removed under reduced pressure. The residue thus obtained was purified by silica gel column chromatography [Silica Gel; Kanto Chemical Co., Inc., Silica Gel 60, eluent; chloroform:methanol=20:1], to give 401 mg of tert-butyl (2,3-dihydro-1,4-benzodioxin-6-ylmethyl)(1-(2-(7-methoxy-5-((methylamino)carbonyl)-2-oxoquinolin-1(2H)-yl)ethyl)piperidin-4-yl)carbamate as a pale brown foam.

Quelle