Metallocene pentaselenides and elemental selenium were employed in an effort to generate diatomic selenium (Se2) under thermal conditions. Trapping experiments were carried out with six dienes. A successful formation of a diselenium adduct was observed in the case of 5,6-dimethylene-cyclohexa-1,3-diene (1a). The other dienes produced the corresponding dihydroselenophenes. The in-depth study of the limitations of our method to generate Se2 is described; a plausible mechanism rationalizing the observed results is proposed.
bibenzyls and related ethane derivatives in high yields. Other diselenides were easily caused to cleave to give various aromatic and aliphatic olefins in good yields together with elemental selenium. Lepidopterene, [2.2]paracyclophane, and benzocyclobutene were prepared by thermal cleavage of their corresponding phenylselenomethyl-substituted compounds as an application of the pyrolysis concerned.
The flash vacuum pyrolysis of benzyl phenyl selenides gave bibenzyls and diphenyl diselenide in excellent yields. This type of reaction was successfully applied to the synthesis of the title compounds.
An Efficient Method for Selective Syntheses of Sodium Selenide and Dialkyl Selenides
作者:Na Hye Shin、Yoo Jin Lim、Chorong Kim、Ye Eun Kim、Yu Ra Jeong、Hyunsung Cho、Myung-Sook Park、Sang Hyup Lee
DOI:10.3390/molecules27165224
日期:——
dialkyl selenide compounds 1 were presented. Overcoming the complexity and difficulty of selenides (R-Se-R) and/or multiselenides (R-Sen-R; n ≥ 2), we aimed to optimize the reaction condition for the tolerable preparation of sodium selenide (Na2Se) by reducing Se with NaBH4, and then to achieve selective syntheses of dialkyl selenides 1 by subsequently treating the obtained sodium selenide with alkyl
介绍了二烷基硒化合物1的选择性合成研究。克服硒化物 (R-Se-R) 和/或多硒化物 (R-Se n -R; n ≥ 2) 的复杂性和难度,我们旨在优化制备硒化钠 (Na 2 Se)耐受性的反应条件通过用NaBH 4还原Se ,然后通过随后用烷基卤化物(RX)处理获得的硒化钠来实现二烷基硒化物1的选择性合成。因此,各种二烷基硒化物1以良好至中等的产率有效合成。还描述了对反应途径和溶剂研究的调查。