Reaction #470412

Reaction equation

4′,7-Dihydroxyisoflav-3-ene

ethanol

Propylamine

formaldehyde

→

title compound

Yield 53.0%

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

Yield 53.0%

Conditions

Workup

1. 1
   OtherThe white precipitate was collected

Procedure

4′,7-Dihydroxyisoflav-3-ene (503 mg, 2.09 mmol) was dissolved in ethanol (20 ml). Propylamine (0.25 ml, 3.04 mmol) was added followed by formaldehyde solution (2 ml, 0.03 mol, 37% wt.). The reaction was stirred at room temperature for 1 day. The white precipitate was collected to afford the title compound (362 mg, 53%).

Source