Lawesson's reagent for direct thionation of hydroxamic acids: Substituent effects on LR reactivity
作者:Witold Przychodzeń
DOI:10.1002/hc.20259
日期:——
To explore the generality and scope of direct thionation of hydroxamic acids (HAs), the reaction of various structurally diverse HAs with Lawesson's reagent was investigated. The yield of thiohydroxamic acid (THAs) is poor when HAs possess bulky acyl and/or N-substituents, acidic α-hydrogen atoms, or an N-phenyl ring. THAs yields were correlated with Brown sigma parameter. The relative rates of two
为了探索异羟肟酸 (HA) 直接硫化的一般性和范围,研究了各种结构不同的 HA 与劳森试剂的反应。当 HA 具有庞大的酰基和/或 N-取代基、酸性 α-氢原子或 N-苯环时,硫代异羟肟酸 (THA) 的产率很低。THA 产量与 Brown sigma 参数相关。还测量了两个后续过程 k 和 k 的相对速率。还发现了 N-异丙基苯并硫代异羟肟酸的次甲基质子化学位移的相关性。© 2006 Wiley Periodicals, Inc. 杂原子化学 17:676–684, 2006; 在线发表于 Wiley InterScience (www.interscience.wiley.com)。DOI 10.1002/hc.20259