Synthesis of internal olefins by direct coupling of alcohols and olefins over Moβ zeolite
作者:Durgaiah Chevella、Arun Kumar Macharla、Srujana Kodumuri、Rammurthy Banothu、Krishna Sai Gajula、Vasu Amrutham、Grigor'eva Nellya Gennadievna、Narender Nama
DOI:10.1016/j.catcom.2019.01.027
日期:2019.4
An efficient and novel Moβ zeolite catalyzed sp2-sp3 CC bond development reaction over the direct coupling of alcohols and alkenes has been performed in solvent free environment. The current method gives an attractive access to a wide variety of polysubstituted alkenes in good to excellent yields. The Moβ zeolite was effectively reused for up to 5 successive cycles.
在无溶剂的环境中,进行了一种有效且新颖的Moβ沸石在醇和烯烃的直接偶联反应中催化的sp 2 -sp 3 C C键发展反应。当前的方法以良好至极好的收率吸引了多种多样的多取代烯烃。Moβ沸石可有效重复使用多达5个连续循环。
Metal-Free and Recyclable Route to Synthesize Polysubstituted Olefins<i>via</i>CC Bond Construction from Direct Dehydrative Coupling of Alcohols or Alkenes with Alcohols Catalyzed by Sulfonic Acid-Functionalized Ionic Liquids
AbstractA direct synthesis of polysubstituted olefins via construction of CC bonds, which involves the direct dehydrative coupling of alcohols or alkenes with alcohols, was realized using a series of alkanesulfonic acid group‐functionalized ionic liquids (SO3H‐functionlization ILs) without additives. The metal‐free and recyclable catalyst system avoided the disposal and neutralization of acidic catalysts after reaction and tolerated a broad range of substrates, including benzylic, allyl, propargylic, aliphatic and aromatic or aliphatic olefins. Additionally, the catalytic system was suitable for a gram‐scale preparation. Preliminary mechanistic studies indicated that the CH bond cleavage in this reaction might be involved in the rate‐determining step.magnified image