The first results utilizing the sterically demanding diene 1 in hetero Diels-Alder reactions are reported. The effect of commonly used Lewis acids and the substitution pattern of various imines on the mechanism of the reaction with the diene 1 is discussed.
                                    本研究首次报道了在杂化 Diels-Alder 反应中利用立体要求较高的二烯 1 的结果。讨论了常用
路易斯酸和各种
亚胺的取代模式对与二烯 1 反应机理的影响。