300710-85-4Relevant academic research and scientific papers
Synthesis of 1,2,4-ditellurazolidines by oxidative ring contraction of 2H,6H-tetrahydro-1,5,3,7-ditelluradiazocines
Takikawa, Yuji,Yoshida, Takamasa,Koyama, Yutaka,Sato, Kazuto,Shibata, Yuko,Aoyagi, Shigenobu,Shimada, Kazuaki,Kabuto, Chizuko
, p. 870 - 871 (2000)
Synthesis of novel five-membered cyclic ditellurides, 4-aryl-1,2,4-ditellurazolidines was achieved by treating 3,7-diaryl-2H,6H-tetrahydro-1,5,3,7-ditelluradiazocines with oxidizing agents or by aerobic exposure. The oxidative ring contraction of the heterocycles was assumed to proceed through formation and subsequent fragmentation of bicyclic ditellura dications.
Synthesis and oxidative ring contraction of 1,5,3,7-dichalcogenadiazocanes. Novel formation of 1,2,4-diselenazolidines, 1,2,4-ditellurazolidines, and 1,2,3,4,5,7-pentathiazocanes
Takikawa, Yuji,Koyama, Yutaka,Yoshida, Takamasa,Makino, Kenshiro,Shibuya, Hiroki,Sato, Kazuto,Otsuka, Tatsuya,Shibata, Yuko,Onuma, Yuki,Aoyagi, Shigenobu,Shimada, Kazuaki,Kabuto, Chizuko
, p. 1913 - 1925 (2007/10/03)
1,5,3,7-Dithiadiazocanes, 1,5,3,7-diselenadiazocanes, and 1,5,3,7-ditelluradiazocanes were prepared from a primary amine, formalin, and H2S, NaSeH, or NaTeH, respectively. Oxidation of 1,5,3,7- diselenadiazocanes and 1,5,3,7-ditelluradiazocanes using NBS efficiently afforded 1,2,4-diselenazolidines or 1,2,4-ditellurazolidines, respectively. In contrast, treatment of 1,5,3,7-dithiadiazocanes with bromine-elemental sulfur or disulfur dichloride (S2Cl2) afforded 1,2,3,4,5,7- pentathiazocanes. An unusual oxidative conversion of 1,5,3,7- dichalcogenadiazocanes into these products was assumed to proceed through in situ formation of 1,5,3,7-dichalcogenadiazabicyclo[3.3.0]octane-type dications.
