作者:Catherine Leriverend、Patrick Metzner、Antonella Capperucci、Alessandro Degl'Innocenti
DOI:10.1016/s0040-4020(96)01071-x
日期:1997.1
Reaction of trithiocarbonates with meta-chloroperoxybenzoic acid in CH2Cl2 at 0°C affords the corresponding S-oxides. These sulfines are relatively stable compounds which can be purified by chromatography. They react readily with organolithiums in THF at −78°C in a thiophilic manner to give carbanions which are stabilized by three sulfur groups. Hydrolysis affords trithioorthoester oxides. The thermal
三硫代碳酸酯与间氯过氧苯甲酸在CH 2 Cl 2中的反应在0℃下,得到相应的S-氧化物。这些亚砜是相对稳定的化合物,可以通过色谱法纯化。它们在-78°C下易与巯基有机锂在四氢噻吩中反应,生成碳负离子,这些碳负离子可通过三个硫基团稳定。水解得到三硫原酸酯氧化物。已经研究了这些受阻产物的热行为,并证明了新的重排过程。以前的碳负离子是柔软的亲核体:这些中间体向α-烯酮的1,4-加成是有选择地导致的,从而导致β-氧代烯酮二乙缩醛被轻易转化为4-氧代烷硫醇酯。该“ Umpolung”途径允许正式使用(烷硫基)羰基阴离子。在存在n-Bu 4的情况下,烯丙基硅烷也发现了亲硫基团NF提供烯丙基亚砜。