报道了使用廉价的FeCl 3催化剂从5-氨基吡唑和芳族醛合成双吡唑并[3,4- b:4',3'- e ]吡啶的温和而有效的方法。与传统方法相比,反应温度从220–250°C降至130°C。在室温下,很大一部分产物直接从混合物中沉淀出来。脂肪族和α,β-不饱和醛选择性地导致形成相应的1 H-吡唑并[3,4- b ]吡啶衍生物。还提出了可能的多米诺反应机制。经由Sonogashira偶联反应将几个芳基炔基引入这些三环分子。
C—H...π and π–π interactions in the supramolecular structure of 3-methyl-1,4-diphenyl-1<i>H</i>-pyrazolo[3,4-<i>b</i>]pyridine
作者:John N. Low、Justo Cobo、Manuel Nogueras、Adolfo Sánchez、Harlen Torres、Braulio Insuasty
DOI:10.1107/s0108270102006340
日期:2002.5.15
The supramolecular structure of the title compound, C19H15N3, is defined by pi-pi-stacking and C-H...pi interactions. There are no conventional hydrogen bonds in the structure.
A mild method for the synthesis of bis-pyrazolo[3,4-b:4′,3′-e]pyridine derivatives
A mild and efficient method for the synthesis of bispyrazolo[3,4-b:4′,3′-e]pyridines from 5-aminopyrazoles and aromatic aldehydes using an inexpensive FeCl3 catalyst is reported. The reaction temperature was reduced from 220–250 °C to 130 °C compared to conventional methods. A large proportion of the products precipitated directly from the mixture at room temperature. Aliphatic and α,β-unsaturated
报道了使用廉价的FeCl 3催化剂从5-氨基吡唑和芳族醛合成双吡唑并[3,4- b:4',3'- e ]吡啶的温和而有效的方法。与传统方法相比,反应温度从220–250°C降至130°C。在室温下,很大一部分产物直接从混合物中沉淀出来。脂肪族和α,β-不饱和醛选择性地导致形成相应的1 H-吡唑并[3,4- b ]吡啶衍生物。还提出了可能的多米诺反应机制。经由Sonogashira偶联反应将几个芳基炔基引入这些三环分子。