66386-25-2Relevant academic research and scientific papers
De Novo Synthesis of Benzannelated Heterocycles
Feierfeil, Johannes,Magauer, Thomas
supporting information, p. 1455 - 1458 (2017/12/28)
Benzannelated heterocycles such as indoles and indazoles are prominent structural motifs found in natural products, pharmaceuticals and agrochemicals. For their synthesis, chemists traditionally either functionalize commercially available heterocycles or resort to transformations that make use of benzene-derived building blocks. Here, we report a powerful cascade reaction that enables the de novo construction of variously substituted indoles, indazoles, benzofurans and benzothiophenes from readily available bicyclo[3.1.0]hexan-2-ones. The transformation can be conducted under mild, non-anhydrous conditions. For the synthesis of indoles, mechanistic studies revealed that the electrocyclic ring-opening of the bicyclic ring-system and aromatization precedes the 3,3-sigmatropic rearrangement.
Synthesis of gem-dinitro compounds with a three-membered cycle
Moiseev,Mratkhuzina,Balenkova,Makarova
, p. 839 - 840 (2007/10/03)
A reaction was studied between nitrogen pentoxide in chloroform and oximes of cyclic ketones, derivatives of bicyclo[3.1.0]hexane, bicyclo[4.1.0]heptane, spiro[2.4]heptane, spiro[2.5]octane, resulting in the corresponding gem-dinitro compounds.
