Scheme 46.
Cycloaddition of N-ethylmaleimide to 1-alkoxycarbonylbenzo [ghi]perylene [141]. Reagents and conditions: (a) p-chloranil, p-hydroxyanisole, rfx (oil bath at 240 °C), 8 h, Y = 70%.
Cycloaddition of N-ethylmaleimide to 1-alkoxycarbonylbenzo [ghi]perylene [141]. Reagents and conditions: (a) p-chloranil, p-hydroxyanisole, rfx (oil bath at 240 °C), 8 h, Y = 70%.