Sulfur-mediated C(sp2)–H imidation and 1,2-imidofluorination of vinyl sulfides

A new strategy for the C(sp²)–H imidation and 1,2-imidofluorination of vinylsulfides has been established through simple treatment with N-fluorobis(benzenesulfonyl)imide, which acts as both oxidant and nitrogen source. For alkyl and electron-rich aryl vinylsulfides, alkyl/arylthioenamines are produced in up to 92% total yields. However, for steric and electron-deficient aryl vinylsulfides, 1,2-imidofluorination products are prepared in up to 73% yields. The chemoselectivity is controlled by the steric and electronic effects of aryl substituents. Thionium ions are proposed as key intermediates in the two reactions.     

A novel imido-transfer reaction of aldehydes with Ph3PNTs using RuCl2(PPh3)3 as catalyst

(N-Tosylimino)triphenylphosphorane (Ph₃PNTs) was found to be an efficient imido-transfer reagent for the imidation of a variety of aldehydes using RuCl₂(PPh₃)₃ as the catalyst.     

阴极电泳涂料用树脂－改性聚丁二烯合成工艺研究

液体聚丁二烯（ＬＰＢ）与过氧乙酸反应生成的环氧化聚丁二烯（ＯＰＢ）再与胺化剂反应生成胶化环氧化聚丁二烯（ＤＯＰＢ）是性能优良的电泳涂料用树脂．实验结果表明ＬＰＢ环氧化反应温度只能在１５～６０℃进行，且高温反应时间不能超过５小时；ＬＰＢ的分子量低．则环氧值增大。ＯＰＢ的胶化反应最佳温度为１１０℃，２ｈ内可完成反应．     

Sulfur-directed metal-free and regiospecific methyl C(sp3)–H imidation of thioanisoles

Regiospecific and direct imidation of the methyl C(sp³)–H bond of thioanisoles is realized under mild and metal-free conditions with N-fluorobis(benzenesulfonyl)imide as an oxidant and nitrogen source. Proposed mechanism suggests that thionium ion intermediates and a Pummerer-type reaction are involved. The imidation has advantages such as high step-economy, excellent functionality tolerance, and regiospecificity, giving structurally diverse imidation products.     

An imido-transfer reaction of aldehydes with N-sulfinylamines using vanadium and molybdenum oxochlorides as catalysts

Vanadium and molybdenum oxochlorides were found to be efficient catalysts for imido-transfer between aldehydes and N-sulfinylamines.