反应详情

Working in a manner similar to that described in Example 12, but starting with (5RS, 6SR)-6-phenyl-2-(2-thienyl)-5,6-dihydro-4H-1,3-oxazin-5-ol (1.55 g) and phenyl isocyanate (0.8 g), and after recrystallization in isopropanol, (5RS, 6SR)-6-phenyl-5-phenylcarbamoyloxy-2-(2-thienyl)-5,6-dihydro-4H-1,3-oxazine (1.75 g), m.p. 98° C., is obtained.

1. customafter recrystallization in isopropanol