Cascade Amination/Cyclization/Aromatization Process for the Rapid Construction of [2,3-<i>c</i>]Dihydrocarbazoles and [2,3-<i>c</i>]Carbazoles
作者:Xing Fan、Liu-Zhu Yu、Yin Wei、Min Shi
DOI:10.1021/acs.orglett.7b01957
日期:2017.9.1
the presence of silver acetate, affording a variety of [2,3-c]dihydrocarbazoles and [2,3-c]carbazoles in moderate to excellent yields. The mechanistic investigations revealed that this cascade reaction proceeds through a radical initiated process. Moreover, further transformations for the synthesis of eustifoline-D and an OLED exhibit a potential synthetic utility of this method.
已经在乙酸银的存在下开发了功能化的亚烷基环丙烷的分子内级联胺化/环化/芳构化反应,以中等至优异的产率提供了各种[2,3- c ]二氢咔唑和[2,3- c ]咔唑。机理研究表明,这种级联反应是通过自由基引发的过程进行的。而且,用于合成奥司替林-D和OLED的进一步转化显示了该方法的潜在合成效用。
Transition Metals in Organic Synthesis, Part 82. First Total Synthesis of Methyl 6-Methoxycarbazole-3-carboxylate, Glycomaurrol, the Anti-TB Active Micromeline, and the Furo[2,3-<i>c</i>]carbazole Alkaloid Eustifoline-D
The palladium(0)-catalyzed amination followed by palladium(II)-catalyzed oxidative cyclization of the resulting diaryl-amine provides a short route to a series of 6-oxygenated carbazole alkaloids: glycozoline, 3-formyl-6-methoxycarbazole, methyl 6-methoxycarbazole-3-carboxylate, glycozolinine (glycozolinol), glycomaurrol, micromeline, and eustifoline-D.
钯 (0) 催化胺化,然后钯 (II) 催化氧化环化所得二芳基胺为一系列 6-氧化咔唑生物碱提供了一条捷径:糖唑啉、3-甲酰基-6-甲氧基咔唑、甲基 6 -甲氧基咔唑-3-羧酸盐、糖唑啉(糖唑啉醇)、糖尿酮、微梅林和eustifoline-D。
Transition metals in organic synthesis - Part 83#: Synthesis and pharmacological potential of carbazoles
作者:Taylor A. Choi、Regina Czerwonka、Ronny Forke、Anne Jäger、Jan Knöll、Micha P. Krahl、Tilo Krause、Kethiri R. Reddy、Scott G. Franzblau、Hans-Joachim Knölker
DOI:10.1007/s00044-007-9073-0
日期:2008.6
the first naturally occurring carbazole alkaloids with antituberculosis (anti-TB) activity, clausine K and micromeline, a study on the structure–activity relationships for anti-TB-active carbazolederivatives has been carried out. The 6-oxygenated carbazoles glycozoline and glycozolinine show antibiotic activity towards several microorganisms. The 7-oxygenated carbazole siamenol exhibits anti-HIV activity
Gas-phase domino cyclization of phosphonium ylides leading to the total synthesis of Eustifoline D
作者:R. Alan Aitken、Lorna Murray
DOI:10.1016/j.tetlet.2017.09.073
日期:2017.11
Six stabilised phosphoniumylides bearing ortho-benzylaminophenyl and cinnamoyl (or a heterocyclic analogue) groups have been prepared and upon flash vacuum pyrolysis at 800 °C were found to undergo cascade cyclization processes to give mainly 3-styrylquinolines but also in some cases ring-fused carbazoles and other fused-ring heterocyclic products. By starting with an appropriate ring-methylated precursor