Green Synthesis of Acylhydrazides Involving a Heterocyclic Moiety using
Terminal Dihaloalkanes in Organic Salt Media under Solvent-Free Conditions
作者:Gholamhassan Imanzadeh、Roghayyeh Asgharzadeh、Zahra Soltanzadeh
DOI:10.2174/1570178619666220127123822
日期:2022.11
presence of DABCO (1,4-diazabicyclo[2.2.2]octane) and TBAB (tetrabutylammonium bromide) undergo a facile intramolecular N2-double-alkylation to form pyrrolidine and piperidine ring derivatives under solvent-free conditions. Moreover, the alkylation of acyl hydrazide with 1,6-dibromohexane as substrate produced the related N2-mono-alkylated derivatives under the same conditions. Interestingly, using K2CO3
摘要:本文研究了一些酰肼与不同末端二溴代烷烃的反应。该研究表明,在 DABCO(1,4-二氮杂双环[2.2.2]辛烷)和 TBAB(四丁基溴化铵)存在下,酰肼与 1,4 和 1,5-二溴代烷烃的反应容易发生分子内 N2-双-烷基化在无溶剂条件下形成吡咯烷和哌啶环衍生物。此外,在相同条件下,以1,6-二溴己烷为底物对酰肼进行烷基化反应生成了相关的N2-单烷基化衍生物。有趣的是,在 1,6-二溴己烷的反应中使用 K2CO3 作为碱会产生含有氮杂环己烷环的酰肼。令人惊讶的是,4-硝基苯并酰肼与 1,2-二溴乙烷的直接烷基化产生恶二嗪环衍生物。