Reaktion #78975

Reaktionsgleichung

1-(4-amino-3′-chloro-biphenyl-3-yl)-1-cyclopropyl-1-propynyl-methanol

1,1′-carbonyldiimidazole

→

6-(3-chlorophenyl)-4-cyclopropyl-4-prop-1-ynyl-1,4-dihydro-benzo[d][1,3]oxazin-2-one

Ausbeute 64.8%

Lösungsmittel

THF

Reaktionsbedingungen

Aufarbeitung

1. 1
   SonstigeUpon completion of the reaction
2. 2
   Sonstigethe THF was removed
3. 3
   Sonstigethe residue purified via flash chromatography (silica gel, 40% ethyl acetate/hexane)

Vorschrift

A mixture of 1-(4-amino-3′-chloro-biphenyl-3-yl)-1-cyclopropyl-1-propynyl-methanol (0.02 g, 0.064 mmol) and 1,1′-carbonyldiimidazole (0.016 g, 0.096 mmol) in dry THF (10 mL) was stirred under a blanket of nitrogen for 10 minutes. Upon completion of the reaction, the THF was removed and the residue purified via flash chromatography (silica gel, 40% ethyl acetate/hexane) to give 6-(3-chlorophenyl)-4-cyclopropyl-4-prop-1-ynyl-1,4-dihydro-benzo[d][1,3]oxazin-2-one (0.014 g, 56%) as a light yellow solid: mp 178-179° C.; 1H-NMR (DMSO-d6) δ 10.6 (s, 1H), 7.68 (m, 2H), 7.64 (bs, 1H), 7.59 (d, 1H, J=7.72 Hz), 7.49 (t, 1H, J=7.82 Hz), 7.42 (d, 1H, J=7.95 Hz), 7.02 (d, 1H, J=8.0 Hz), 1.86 (s, 3H), 1.66 (m, 1H), 0.82 (m, 1H), 0.66 (m, 3H); MS (ESI) m/z 336 ([M−H]−, 100%).

Quelle