Domino Reaction to Functionalized 2-Hydroxybenzophenones from Electron-Deficient Chromones and 1,3-Dicarbonyl Compounds
作者:Hong Chen、Fuchun Xie、Jian Gong、Youhong Hu
DOI:10.1021/jo201384f
日期:2011.10.21
A base-promoted one-pot tandemreaction sequence has been developed to transform electron-deficient chromone-fused dienes 1 and 1,3-dicarbonylcompounds 2 to functionalized 2-hydroxybenzophenones 3 under mild conditions. This domino process, which involves multiple reactions, including Michael addition/cyclization/elimination, serves as an efficient, economic, and eco-friendly method for the construction
Ionic Liquids and Ohmic Heating in Combination for Pd-Catalyzed Cross-Coupling Reactions: Sustainable Synthesis of Flavonoids
作者:Vera L. M. Silva、Raquel G. Soengas、Artur M. S. Silva
DOI:10.3390/molecules25071564
日期:——
In order to meet the increasing demand for environmentally benign chemical processes, we developed a Suzuki–Miyaura reaction protocol based on the combination of ohmic heating (ΩH) and supported ionic liquid phase catalysis (SILPC) in aqueous media. This methodology was applied to the synthesis of a series of flavonoid derivatives, including isoflavones, styrylisoflavones, and diarylalkenylisoflavones
Domino reactions of 2-methyl chromones containing an electron withdrawing group with chromone-fused dienes
作者:Jian Gong、Fuchun Xie、Wenming Ren、Hong Chen、Youhong Hu
DOI:10.1039/c1ob06613g
日期:——
Domino reactions of 2-methyl substituted chromones containing an electronwithdrawinggroup at the 3-position with chromone-fused dienes synthesized a diverse range of benzo[a]xanthones and complicated chromone derivatives. These multiple-step reactions result in either two or three new C–C bonds without a transition metal catalyst or an inert atmosphere.
在3位上具有吸电子基团的2-甲基取代的色酮与色酮稠合的二烯的多米诺反应合成了多种苯并[ a ]氧杂蒽酮和复杂的色酮衍生物。这些多步反应可产生两个或三个新的C–C键,而无需过渡金属催化剂或惰性气氛。