Fig. 4: Synthetic application.

a Gram-scale reactions and transformations of the product 4ah; b Remove the p-methoxyphenyl group in 4 g; c Multi-component reaction with dibenzyl-1-methoxymethanamine. DBU = 1,8-Diazabicyclo[5.4.0]undec-7-ene, CAN ceric ammonium nitrate.