Synthesis, structure and reactivity of some chiral benzylthio alcohols, 1,3-oxathiolanes and their <i>S</i>-oxides
作者:R. Alan Aitken、Philip Lightfoot、Andrew W. Thomas
DOI:10.1080/17415993.2020.1754418
日期:2020.7.3
ABSTRACT A series of amino acid-derived chiral benzylthio alcohols have been prepared and characterized. A chiral mercapto alcohol derived from S-leucine has been used to form three chiral 2,4-disubstituted 1,3-oxathiolanes. One of these has been oxidized to the S-oxide and another to the S,S-dioxide. The cis and trans isomers have been characterized by 1H NMR in each case and it appears that thermal
摘要 已经制备并表征了一系列氨基酸衍生的手性苄硫醇。衍生自 S-亮氨酸的手性巯基醇已被用于形成三个手性 2,4-二取代 1,3-氧杂硫杂环戊烷。其中一个已被氧化为 S-氧化物,另一个已被氧化为 S,S-二氧化物。在每种情况下,顺式和反式异构体均已通过 1 H NMR 表征,并且似乎在亚砜氧化态下 C-2 处的热差向异构化是可能的。2-苯基-4-异丁基-1,3-氧杂硫杂环戊烷 S,S-二氧化物的主要反式非对映体的 X 射线结构显示了一个包膜构象,在襟翼处有氧,在硫处的内角仅为 93.8°。该化合物在 700°C 下进行快速真空热解时会碎裂,生成 SO2、苯甲醛和 4-甲基戊-1-烯。图形概要