Bi(OTf) 3 catalyzed disproportionation reaction of cinnamyl alcohols
作者:Chieh-Kai Chan、Yu-Lin Tsai、Meng-Yang Chang
DOI:10.1016/j.tet.2017.05.006
日期:2017.6
Bi(OTf)3 catalyzed disproportionationreaction of cinnamyl alcohols provides chalcones and benzyl styrenes. The use of various metal triflates is investigated herein for facile and efficient redox transformation. A plausible mechanism has been proposed.
Palladium-Catalyzed Heck-Type Reactions of Allylic Esters with Arylboronic Acids or Potassium Aryltrifluoroborates
作者:Bo Yao、Yan Liu、Meng-Ke Wang、Jin-Heng Li、Ri-Yuan Tang、Xing-Guo Zhang、Chen-Liang Deng
DOI:10.1002/adsc.201100889
日期:2012.4.16
A selective and general route to (E)‐1,3‐diaryl‐prop‐1‐enes and (E)‐3‐arylallyl acetates has been developed by palladium‐catalyzed Heck‐type reactions of allylic esters with arylboronicacids or potassium aryltrifluoroborates. The present method selectively proceeds including β‐OAc elimination or β‐H elimination on the basis of the boronic acids. Whereas a variety of allylic esters were reacted with
of Cs2CO3, the first simple, efficient, and one-pot procedure for the synthesis of 3,5-diaryl pyridines via a variety of aromatic terminal alkynes with benzamides as the nitrogen source in sulfolane is described. The formation of pyridine derivatives accompanies the outcome of 1,3-diaryl propenes, which are also useful intermediates in organic synthesis. Thus, pyridine ring results from a formal [2+2+1+1]
在 Cs 2 CO 3的存在下,描述了第一个简单、有效和一锅法合成 3,5-二芳基吡啶的方法,该方法通过各种芳族末端炔烃以苯甲酰胺作为环丁砜中的氮源。吡啶衍生物的形成伴随着 1,3-二芳基丙烯的生成,这也是有机合成中有用的中间体。因此,吡啶环源自三个炔烃与苯甲酰胺的正式 [2+2+1+1] 环缩合反应,其中一个炔烃提供一个碳,而苯甲酰胺仅提供氮源。在这项工作中发现了炔烃的新转化以及苯甲酰胺的新用途。