In the previous communication we reported the synthesis of ureas from aliphatic amines and carbon monoxide using selenium as a catalyst!.
Selenium as a novel oxidizing agent. Selenium catalyzed synthesis of carbonates by the reaction of formates with alkoxides.
β Scribed by Kiyoshi Kondo; Noboru Sonoda; Hiroshi Sakurai
- Publisher
- Elsevier Science
- Year
- 1974
- Tongue
- French
- Weight
- 106 KB
- Volume
- 15
- Category
- Article
- ISSN
- 0040-4039
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π SIMILAR VOLUMES
Reaction of tert-butylarylmethylenetriphenylphosphoranes with elemental selenium afforded the corresponding 1,2,4triselenolanes (1), 1,3-diselenetanes (4), and triphenylphosphine selenide. Triselenolanes 1 were formed from selenation of 4, which may suggest a stepwise selenation of selenoketones.
Wittig reagents were successfully changed to symmetrical olefins when treated with elemental selenium. The reaction proceeds through a selenocarbonyl intermediate, which existence was confirmed by Diels-Alder reaction. Phosphonium ylides (1) have been widely utilized for the synthesis of olefins' an
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As a part of our continuing studies on the organic selenium chemistry, we reported that ureas can be synthesized by the reaction of carbon monoxide with ammonia or amines in the presence of selenium catalyst and oxygen. 1,2) The formation of ureas in such cases was interpreted as involving the react