Starting from 2-chloro-2-formylindole, new syntheses of murrayaquinone A and furostifoline were achieved by an allene-mediated electrocyclic reaction involving the indole 2, 3-bond.
以 2-氯-2-甲酰基吲哚为起点,通过涉及吲哚 2,3-键的烯介导电环反应,实现了新的 murrayaquinone A 和 furostifoline 的合成。
Novel Syntheses of Murrayaquinone A and Furostifoline through 4-Oxygenated Carbazoles by Allene-Mediated Electrocyclic Reactions Starting from 2-Chloroindole-3-carbaldehyde.
The formal total synthesis of murrayaquinone A (1) and the total synthesis of furostifoline (5) were completed by the construction of 4-oxygenated 3-methylcarbazoles 7 based on a new type of electrocyclicreaction through 2-alkenyl-3-allenylindole intermediates 8 derived from the 2-alkenyl-3-propargylindoles 9, starting from 2-chloroindole-3-carbaldehyde (11). The N,O-bisbenzyloxymethyl group of 16c