作者:Kristina D. Lacey、Rashanique D. Quarels、Shaofu Du、Ashley Fulton、Nicholas J. Reid、Austin Firesheets、Justin R. Ragains
DOI:10.1021/acs.orglett.8b02125
日期:2018.9.7
4-(4-methoxyphenyl)-4-pentenylthioglycosides (MPTGs), undergo acid-catalyzed O-glycosylations with a range of sugar and nonsugar alcohols at 25 °C. Electron density at the styrene alkene is critical for reactivity while sugar protecting group patterns have a minimal effect. In contrast with most methods for thioglycoside activation, acid-catalyzed activation of MBTGs is compatible with electroneutral alkenes
两类硫代糖苷(4-(4-甲氧基苯基)-3-丁烯基硫代糖苷(MBTG)和4-(4-甲氧基苯基)-4-戊烯基硫代糖苷(MPTG))经过酸催化的O-糖基化反应,并带有一系列糖和非糖醇在25°C下。苯乙烯烯烃上的电子密度对于反应性至关重要,而糖保护基的作用则微乎其微。与大多数硫糖苷活化方法相反,MBTG的酸催化活化与电子中性烯烃相容。