The treatment of selenonium N-p-toluenesulfonimides and selenoxides except diphenyl selenoxide with active methylene compounds readily afforded the corresponding stable selenonium ylides in relatively high yields.
Metal-Free Synthesis of Phenol-Aryl Selenides via Dehydrogenative C–Se Coupling of Aryl Selenoxides with Phenols
作者:Zhengfen Liu、Yonggang Jiang、Chunxiang Liu、Linlin Zhang、Jing Wang、Tiantian Li、Hongbin Zhang、Minyan Li、Xiaodong Yang
DOI:10.1021/acs.joc.0c00792
日期:2020.6.5
Herein, we disclose the synthesis of diaryl selenides through an unexpected C–Se coupling between aryl benzyl selenoxides and phenols. The synthetic significance of the method is that it provides a mild, rapid, and metal-free access to organoselenides in high yields with excellent functional group tolerance. This coupling of aryl benzyl selenoxides reveals a completely new reaction possibility compared
Selenium stabilized carbanions. .alpha.-Lithio selenoxides as reagents for the synthesis of olefins, allyl alcohols, and dienes
作者:Hans J. Reich、Shrenik K. Shah、Flora Chow
DOI:10.1021/ja00516a026
日期:1979.10
Techniques for the preparation of a-lithio selenoxides have been developed. These reagents react cleanly with most aldehydes and ketones to give 0-hydroxy selenoxides, which can be thermolyzed to allyl alcohols or reduced to hI result of the limited acidifying power of the phenylseleno group, and the propensity of selenides to be fragmented upon treatment with powerful metalating agents. The substantially
Selenenate Anions (PhSeO
<sup>−</sup>
) as Organocatalyst: Synthesis of
<i>trans</i>
‐Stilbenes and a PPV Derivative
作者:Zhipeng Zheng、Oleksandra S. Trofymchuk、Takashi Kurogi、Elena Varela、Daniel J. Mindiola、Patrick J. Walsh
DOI:10.1002/adsc.201901201
日期:2020.2.6
The selenenate anion (RSeO−) is introduced as an active organocatalyst for the dehydrohalogen coupling of benzyl halides to form trans‐stilbenes. It is shown that RSeO− is a more reactive catalyst than the previously reported sulfur analogues (sulfenateanion, RSO−) and selenolate anions (RSe−) in the aforementioned reaction. This catalytic system was also applied to the benzylic‐chloromethyl‐coupling
Monooxygenase-catalysed metabolism of thioethers and selenoethers by fungi
作者:Barbara J. Auret、Derek R. Boyd、H.Bernard Henbest、Christopher G. Watson
DOI:10.1016/0031-9422(73)85064-2
日期:1973.11
Abstract Evidence for mono-oxygenase activity during the metabolism of thioethers by the fungus Aspergillus niger is presented. Attempts to obtain selenoxides as microbial metabolic products are described.