220798-59-4Relevant academic research and scientific papers
Studies on tellurium-containing heterocycles. Part 18. Preparation and structure of 2-benzotelluropyrylium salts and 2-benzoselenopyrylium salts
Sashida, Haruki,Ohyanagi, Kazuo,Minoura, Mao,Akiba, Kin-Ya
, p. 606 - 612 (2007/10/03)
The regioselective and stereospecific intramolecular ring closure reactions of o-ethynylbenzyl tellurols 5A and o-ethynylbenzyl selenols 5B, which were readily generated by the reaction of the o-ethynylbenzyl bromides 4 with sodium hydrogen telluride (NaH
Reaction of 2-benzoselenopyrylium salts with nucleophiles: Formation of 1-functionalized isoselenochromenes
Sashida, Haruki,Ohyanagi, Kazuo
, p. 17 - 20 (2007/10/03)
1-Unsubstituted isoselenochromenes (3) were converted into the 2- benzoselenopyrylium salts (4) by treatment with Ph3C+ BF4- and the reaction of the salts (4) with several nucleophilic reagents (alcohol, amine, cyanide, acetone, and Grignard reagents) afforded the corresponding 1- functionalized isoselenochromenes (5-9) in high yields, respectively. 1- Alkyl- and 1-phenyl-2-benzoselenopyrylium salts (10) were also obtained from 9.
