76447-63-7Relevant academic research and scientific papers
Synthesis and Structure of Novel 1,8-Bridged Fluorenophanes
Tsuge, Akihiko,Ueda, Yasuhiro,Araki, Tadashi,Moriguchi, Tetsuji,Sakata, Kazunori,Koya, Keizo,Mataka, Shuntaro,Tashiro, Masashi
, p. 168 - 169 (1997)
A novel 1,8-bridged fluorenophane (4a) is found to assume an 'inward-folded' conformation with the bulky tart-butyl group located in the cavity, a situation which is different from the conformation of the corresponding dithiafluorenophane (3a).
Multidentate thioether ligands coating gold nanoparticles
Peterle, Torsten,Leifert, Annika,Timper, Jan,Sologubenko, Alla,Simon, Ulrich,Mayor, Marcel
scheme or table, p. 3438 - 3440 (2009/02/05)
The design and synthesis of oligomeric ligands based on benzylic thioethers is presented together with their ability to enwrap and stabilize gold nanoparticles with diameters below 2 nm, which become - with increasing length of the oligomer - more monodisperse and stable. The Royal Society of Chemistry.
Selective Preparation. 30. A Convenient Preparation of 5,13-Di-tert-butyl-8,16-disubstituted-metacyclophanes and Their Trans-tert-butylation and Halogenation Reactions
Tashiro, Masashi,Yamato, Takehiko
, p. 1543 - 1552 (2007/10/02)
The preparation of 5,13-di-tert-butyl-8,16-disubstituted-metacyclophanes (16a-k) from the corresponding 4-substituted-tert-butylbenzenes was described.The AlCl3-CH3NO2-catalyzed trans-tert-butylation of 5,13-di-tert-butyl-8,16-dimethylmetacyclophane (16b) in benzene afforded 8,16-dimethylmetacyclophane (28a) in good yield.However, the similar reaction of diethyl derivative 16c gave only a complex mixture of products.Treatment of 16b and 28a with NBS in CCl4 afforded the corresponding dibromides 38 and 39 in 86percent and 95percent yields, respectively.The bromination of 16b and 16c with bromine in CCl4 afforded the corresponding anti-10b,10c-dialkyl-4,5,9,10-tetrabromo-2,7-di-tert-butyl-10b,10c-dihydropyrenes 41a and 41b in good yields, respectively.However, it was also found that the bromination of 16b and 16c in the presence of Fe powder in the same solvent afforded 4,5,9,10-tetrabromo-2,7-di-tert-butylpyrene (40) in good yield in all cases.On the other hand, the bromination of 28a with bromine in the presence of Fe powder gave 2,7-dimethyl-3,6,8,11-tetrabromo-4,5,9,10-tetrahydropyrene (42).The reaction pathway of the bromination of 16 is discussed.
