Facile Biginelli-Type Reactions Catalysed by Super Acidic Ionic Liquid under Solvent-Free Conditions
作者:Liang Wang、Min Zhou、Qun Chen、Ming-Yang He
DOI:10.3184/174751912x13518654161237
日期:2012.12
[MeC(OH)2]+ClO4- as a super acidicionicliquid is an extremely active catalyst for Biginelli-type reactions. The present method is especially effective for the inactive aliphatic aldehydes. The solvent-freeconditions, high catalytic activity, wide substrates tolerance and convenient product isolation make the protocol more advantageous.
Green Biginelli-type Reaction: Solvent-free Synthesis of 5-unsubstituted 3,4-dihydropyrimdin-2(1<i>H</i>)-ones
作者:Min Wang、Jilei Song、Qilin Lu、Qinglin Wang
DOI:10.1002/jhet.2279
日期:2015.11
The Biginelli‐type compounds, 5‐unsubstituted 3,4‐dihydropyrimdin‐2(1H)‐ones were synthesized by a one‐pot three‐component condensation of aromatic aldehydes, aromatic ketones and urea in the presence of SnCl4 · 5H2O under solvent‐free conditions. The advantages of this method are short reaction time (4–10 min), excellent yields (74–97%), inexpensive catalyst and solvent‐free conditions. A plausible