Reaction #470414

Reaction equation

4′,7-Dihydroxyisoflav-3-ene

ethanol

Aniline

formaldehyde

→

title compound

Yield 7.0%

4-(3-Phenyl-2,3,4,8-tetrahydrochromeno[6,7-e][1,3]oxazin-7-yl)phenol

Yield 7.0%

Conditions

Workup

1. 1
   OtherThe white precipitate was collected

Procedure

4′,7-Dihydroxyisoflav-3-ene (501 mg, 2.09 mmol) was dissolved in ethanol (15 ml). Aniline (0.25 ml, 2.74 mmol) was added followed by formaldehyde solution (2 ml, 0.03 mol, 37% wt.). The reaction was stirred at room temperature for 3 days. The white precipitate was collected to afford the title compound (53 mg, 7%).

Source