Temperature-Controlled Synthesis of Substituted Pyridine Derivatives via the [5C + 1N] Annulation of 1,1-Bisalkylthio-1,4-pentanedienes and Ammonium Acetate
摘要:
A novel temperature-control led one-pot synthesis of substituted pyridine derivatives via [5C + 1N] annulation of 1,1-bisalkylthio-1,4-pentanedienes and ammonium acetate is developed, and possible mechanisms leading to the divergent formation of the two types of pyridines are discussed.
BF<sub>3</sub>·Et<sub>2</sub>O-Catalyzed Direct Carbon−Carbon Bond Formation of α-EWG Ketene-(<i>S</i>,<i>S</i>)-Acetals and Alcohols and Synthesis of Unsymmetrical Biaryls
作者:Qian Zhang、Shaoguang Sun、Jianglei Hu、Qun Liu、Jing Tan
DOI:10.1021/jo061775e
日期:2007.1.1
efficient BF3·OEt2-catalyzed formal dehydration C−C coupling reaction between readily available α-EWG ketene-(S,S)-acetals and various alcohols via direct substitution of the hydroxy group in alcohols has been developed. On the basis of this C−C coupling reaction, a series of alkylated α-EWG ketene-(S,S)-acetals and functionalized 1,4-pentanedienes were prepared in high to excellent yields and the unsymmetrical
Temperature-Controlled Synthesis of Substituted Pyridine Derivatives via the [5C + 1N] Annulation of 1,1-Bisalkylthio-1,4-pentanedienes and Ammonium Acetate
作者:Jianglei Hu、Qian Zhang、Hongjuan Yuan、Qun Liu
DOI:10.1021/jo702586p
日期:2008.3.1
A novel temperature-control led one-pot synthesis of substituted pyridine derivatives via [5C + 1N] annulation of 1,1-bisalkylthio-1,4-pentanedienes and ammonium acetate is developed, and possible mechanisms leading to the divergent formation of the two types of pyridines are discussed.