Synthesis and anti-tumor activity of marine alkaloids
作者:Shiyang Zhou、Gangliang Huang、Guangying Chen
DOI:10.1016/j.bmcl.2021.128009
日期:2021.6
Marine alkaloids were divided into five categories from the perspective of anti-tumor activity. The optimization process, chemical synthesis, anti-tumor activity evaluation and structure–activity relationship of various compounds were discussed.
Rhodium(III)-Catalyzed Dehydrogenative Annulation and Spirocyclization of 2-Arylindoles and 2-(1<i>H</i>-Pyrazol-1-yl)-1<i>H</i>-indoles with Maleimides: A Facile Access to Isogranulatimide Alkaloid Analogues
作者:Vikki N. Shinde、Krishnan Rangan、Dalip Kumar、Anil Kumar
DOI:10.1021/acs.joc.0c02467
日期:2021.2.5
A Rh(III)-catalyzed dehydrogenative annulation and spirocyclization of 2-arylindoles and 2-(1H-pyrazol-1-yl)-1H-indole with maleimides is described. The cascade protocol provided highly functionalized benzo[a]pyrrolo[3,4-c]carbazole-1,3(2H,8H)-diones and spiro[isoindolo[2,1-a]indole-6,3′-pyrrolidine]-2′,5′-diones in good to excellent. The developed reaction methodology exhibited broad substrate scope
描述了Rh(III)催化的2-芳基吲哚和2-(1H-吡唑-1-基)-1H-吲哚与马来酰亚胺的脱氢环化和螺环化。级联方案提供了高度官能化的苯并[ a ]吡咯并[3,4- c ]咔唑-1,3(2 H,8 H)-二酮和螺[异吲哚并[ 2,1- a ]吲哚-6,3'-吡咯烷] -2',5'-二烯良好。发达的反应方法具有广泛的底物范围和良好的官能团耐受性,并且操作简单且可扩展。研究了环状产物的光物理性质。2-(1 H-吡唑-1-基)-1 H的环状产物与2-苯基吲哚相比,-吲哚显示出高的吸收和发射值,并且具有大的红移。
Hypoiodite-Catalyzed Oxidative Umpolung of Indoles for Enantioselective Dearomatization
Here we report the oxidative umpolung of 2,3-disubstituted indoles toward enantioselective dearomative aza-spirocyclization to give the corresponding spiroindolenines using chiral quaternary ammonium hypoiodite catalysis. Mechanistic studies revealed the umpolung reactivity of C3 of indoles by iodination of the indole nitrogen atom. Moreover, the introduction of pyrazole as an electron-withdrawing
Bis(2-cycloazylindolyl)titanium Complexes: Synthesis, Characterization, and the Catalytic Behaviors towards Hydroamination and Ring-opening Polymerization of ϵ-Caprolactone
作者:Jing-Jing Zhao、Hao Pei、Yan-Mei Chen、Ning Lu、Jin-Na Liu、Jin-Fa Hu、Wei Liu、Wu Li、Yahong Li
DOI:10.1002/zaac.201500072
日期:2015.6
corresponding complexes Ti(L1)2(NMe2)2 (1) and Ti(L2)2(NMe2)2 (2), respectively. The titaniumcomplexes were fully characterized by NMR measurement and elemental analysis as well as the single-crystal X-ray diffraction of 1 and 2. Both 1 and 2 exhibit high activities towards intermolecular hydroamination of terminal alkynes with high selectivity, and they also efficiently promote the ring-opening polymerization
addition of the intermediates on dibromomaleimide, the so-obtained acyclic adducts being finally photochemically cyclised to the desired analogues. Compounds of the second series were obtained by reacting different 5-substituted-indole-3-glyoxylates with N-Boc-pyrazole-3-acetamide and subsequent photochemicalcyclisation of the adducts.