通过使PhPCl 2与Grignard试剂和元素硒反应,可以得到P-手性烷基或芳基苯基膦基硒代氯化物。P也通过处理的PCl得到-手性二烷基氯化物3与两个不同的格氏试剂和元素硒。通过X射线分子结构分析确定氯化物的结构。P-带有P的手性膦硫代人亚麻油酸酯Se的双键是通过用碱金属醇盐和硫属元素化物处理氯化物而合成的,而带有P-Se单键的是通过依次用氢氧化钠,硫化物或硒化物和烷基碘对氯化物进行处理而获得的。酯的X射线分子结构分析表明,它们采用了gauche构象。计算结果支持观察到的构象偏好。对模型化合物的自然键轨道分析表明,在这些化合物中,两种类型的非键轨道相互作用(n E ' →σ* P = E和n E →σ* P - E ')很重要。实验77之间观察到线性相关酯中的Se NMR化学位移或P-Se键的偶联常数以及模型化合物的计算出的P-Se键长度。
An efficient synthesis of selenothiophosphinic acid salts is achieved by reacting selenothiophosphinic acid S-(2-trimethylsilyl)ethyl esters with ammonium or alkalimetal fluorides. The X-ray structure analysis of the potassium 18-crown-6 selenothiophosphinic acid salt shows that the salt is monomeric. Alkylation of the salts proceeds at the selenium atom whereas acylation occurs at the sulfur atom
硒硫代次膦酸盐的有效合成是通过使硒代硫代次膦酸 S-(2-三甲基甲硅烷基)乙酯与铵或碱金属氟化物反应来实现的。18-冠-6 硒代硫代次膦酸钾的 X 射线结构分析表明该盐是单体的。盐的烷基化发生在硒原子上,而酰化发生在硫原子上。
Phosphinoselenothioic Acids and Their Salts: Synthesis, Characterization, and Reaction with Electrophiles
and P-methylseleno-P-methylthiophosphonium triflate were determined by X-ray molecular structure analyses. These salts exhibited monomeric structures, and the central phosphorus atoms adopted tetrahedral structures. Alkylation of the ammonium salts selectively gave phosphinoselenothioic acid Se-alkyl esters, whereas acylation of the salts preferentially gave S-acyl products. Protonation of the salts
<i>P</i>-Chiral Phosphinoselenoic Chlorides and Phosphinochalcogenoselenoic Acid Esters: Synthesis, Characterization, and Conformational Studies
作者:Tsutomu Kimura、Toshiaki Murai
DOI:10.1021/jo0484979
日期:2005.2.1
phosphinochalcogenoselenoic acid esters bearing a PSe double bond were synthesized by treating the chlorides with alkali metal alkoxide and chalcogenolates, whereas those bearing a P−Se single bond were obtained by sequential treatment of the chlorides with sodium hydroxide, sulfide or selenide, and alkyl iodides. X-ray molecular structure analyses of esters showed that they adopted gauche conformations. The computational
通过使PhPCl 2与Grignard试剂和元素硒反应,可以得到P-手性烷基或芳基苯基膦基硒代氯化物。P也通过处理的PCl得到-手性二烷基氯化物3与两个不同的格氏试剂和元素硒。通过X射线分子结构分析确定氯化物的结构。P-带有P的手性膦硫代人亚麻油酸酯Se的双键是通过用碱金属醇盐和硫属元素化物处理氯化物而合成的,而带有P-Se单键的是通过依次用氢氧化钠,硫化物或硒化物和烷基碘对氯化物进行处理而获得的。酯的X射线分子结构分析表明,它们采用了gauche构象。计算结果支持观察到的构象偏好。对模型化合物的自然键轨道分析表明,在这些化合物中,两种类型的非键轨道相互作用(n E ' →σ* P = E和n E →σ* P - E ')很重要。实验77之间观察到线性相关酯中的Se NMR化学位移或P-Se键的偶联常数以及模型化合物的计算出的P-Se键长度。