Selenothioic Acid <i>S</i>-Esters: Synthesis, Characterization, and Trend for Stability
作者:Toshiaki Murai、Kaori Kakami、Akihiro Hayashi、Toshihiro Komuro、Hiroya Takada、Makiko Fujii、Takahiro Kanda、Shinzi Kato
DOI:10.1021/ja970462l
日期:1997.9.1
Selenothioic acid S-alkyl esters were synthesized from the reaction of terminal acetylenes with n-butyllithium, selenium, and alkanethiols in moderate to high yields. The use of substituted benzenethiols or (triphenylsilyl)acetylene allowed for the isolation of S-aryl esters. The synthesis of α-aryl selenothioic acid S-alkyl esters was attained by the acid-catalyzed reaction of selenoacetic acid Se-alkynyl
硒硫代酸 S-烷基酯是由末端乙炔与正丁基锂、硒和链烷硫醇以中等至高产率反应合成的。使用取代的苯硫醇或(三苯基甲硅烷基)乙炔可以分离 S-芳基酯。α-芳基硒代硫代酸S-烷基酯的合成是通过硒代乙酸硒-炔基酯与硫醇的酸催化反应以良好的收率合成的。77Se NMR 研究表明,一系列酯的化学位移比硒酯低约 500 ppm,比硒酮高约 600 ppm。在可见光谱中,在约 340 和 568 nm 处观察到酯的吸收。α-甲硅烷基酯的 X 射线分子结构分析表明,硒羰基中的键距分别为 1.792 和 1。分别为 785 A。S-苯基酯的分解产物证实了1,3-二硒烷的形成。硒代硫酸稳定性的趋势...