Title:The Synthetic Progress of Fused Bicyclic N,O-acetals
Volume: 26
Issue: 24
Author(s): Shuyan Yu*, Zeyu Liu, Hongbing Lan, Kun Qian, Xiaohua Ding*Zhigang Yin
Affiliation:
- Material and Chemical Engineering College, Zhengzhou University of Light Industry, Zhengzhou, Henan, P.R. China
- Jiangsu
Hansoh Pharmaceutical Group Co., Ltd. Lianyungang, Jiangsu, P.R. China
Keywords:
N, O-acetals, hetero-Diels-Alder (hetero-DA), multicomponent domino reaction (MCR), hydroxyl groups, cyclic enamines, cycloaddition.
Abstract: Owing to the prevalent occurring in natural products and abundant bioactivities, the effective
synthetic methods of fused bicyclic N,O-acetals skeletons are of great interest to chemists. This
mini-review summarized the thus far synthetic progress of fused bicyclic N,O-acetals. These works
were elaborated according to the different reaction types, including a) hetero-Diels-Alder cycloaddition
of cyclic enamines with oxadienes; b) step-by-step reactions between cyclic enamines and electrophiles
with pendant hydroxyl groups; c) [3+2] cycloaddition of indole with quinone or its equivalent
and d) other novel strategies. The catalytic systems and reaction mechanisms are mainly described.