α, α′ -Dioxo (ester ) ketene cyclic S, S-acetais 2 were reacted withethyleneddriine to chrd α, α′-dioxo (ester)ketene cyclic N, N-acetals 3 Thisprocess provides a new method for the synthesis of 3 in gnd yteld u...α, α′ -Dioxo (ester ) ketene cyclic S, S-acetais 2 were reacted withethyleneddriine to chrd α, α′-dioxo (ester)ketene cyclic N, N-acetals 3 Thisprocess provides a new method for the synthesis of 3 in gnd yteld under mildcondition. All products are confirmed with elementai analpeis, IR, 1H NMR and13~C NMR展开更多
Cyclic dithioacetals of α,α-dioxo (estcr) ketene 3 were reacted with butanone to afford the Michael adducts 4, catalyZed by metal Na. This process provides a new method for the Synthesis of ring-compouds in goob yie...Cyclic dithioacetals of α,α-dioxo (estcr) ketene 3 were reacted with butanone to afford the Michael adducts 4, catalyZed by metal Na. This process provides a new method for the Synthesis of ring-compouds in goob yield under mild conditions.展开更多
文摘α, α′ -Dioxo (ester ) ketene cyclic S, S-acetais 2 were reacted withethyleneddriine to chrd α, α′-dioxo (ester)ketene cyclic N, N-acetals 3 Thisprocess provides a new method for the synthesis of 3 in gnd yteld under mildcondition. All products are confirmed with elementai analpeis, IR, 1H NMR and13~C NMR
文摘Cyclic dithioacetals of α,α-dioxo (estcr) ketene 3 were reacted with butanone to afford the Michael adducts 4, catalyZed by metal Na. This process provides a new method for the Synthesis of ring-compouds in goob yield under mild conditions.
