1229985-76-5Relevant academic research and scientific papers
Studies on chalcogen-containing heterocycles. Part 37: M-CPBA oxidation of isotellurochromenes and isoselenochromenes
Sashida, Haruki,Kaname, Mamoru,Ohyanagi, Kazuo,Minoura, Mao
, p. 10502 - 10509,8 (2012/12/12)
The oxidation of the 1-unsubstituted isotellurochromenes and isoselenochromenes with m-CPBA resulted in a novel ring-opening reaction to give the o-formyl distyryl ditellurides and diselenides as the sole products in good yields, respectively. The o-benzoyl distyryl ditelluride and diselenide were also produced from the corresponding 1-phenylisochromenes. In contrast, the 1-benzyl and 1-n-butylisochromenes were oxidized to afford the (Z)-1-benzylideneisochromenes and (Z)-1-butylideneisochromenes under similar conditions; no distyryl compounds were obtained. The distyryl compounds were also obtained by the hydrolysis of the corresponding 2-benzochalcogenopyrylium salts, which were easily converted from the 2-benzoisochromenes by treatment with triphenylcarbenium tetrafluoroborate (Ph3C+BF4-).
Novel oxidative ring opening reaction of 1H-isotellurochromenes to bis(o-formylstyryl) ditellurides
Sashida, Haruki,Satoh, Hirohito,Ohyanagi, Kazuo,Kaname, Mamoru
scheme or table, p. 1466 - 1472 (2010/06/13)
The oxidation of 1-unsubstituted or 1-phenyl-1H-isotellurochromenes with m-chloroperbenzoic acid (mCPBA) in CHCl3 resulted in a ring opening reaction to produce as the sole products the corresponding o-formyl or benzoyl distyryl ditellurides, which were also produced by the hydrolysis of the 2-benzotelluropyrylium salts readily prepared from the parent isotellurochromene.
