6-naphthyridines and pyrano[3,2-c]pyridines were selectively synthesized via microwave-assisted reactions controlled by the nature of the solvent. This has resulted in an efficient and promising synthetic method for constructing the 1,6-naphthyridine and pyrano[3,2-c]pyridine skeletons. solvent-dependent chemoselectivity - 1,6-naphthyridines - pyrano[3,2-c]pyridines
通过受溶剂性质控制的微波辅助反应,有选择地合成了一系列的1,6-萘啶和吡喃并[3,2- c ]吡啶。这导致了一种有效且有前途的合成方法,用于构建1,6-萘吡啶和吡喃并[3,2- c ]吡啶骨架。 溶剂依赖性化学选择性-1,6-萘吡啶-吡喃并[3,2- c ]吡啶
An efficient method for synthesis of pyrano[3,2-<i>c</i>]pyridine derivatives under microwave irradiation
A series of pyrano[3,2-c]pyridine derivatives were synthesized via reactions of 3,5-dibenzylidene-piperidin-4-one and malononitrile in N,N-dimethylformamide undermicrowave irradiation. It is a simple, efficient, and promising synthetic method to construct pyrano[3,2-c]pyridine skeleton. J. Heterocyclic Chem., (2009).
通过以下反应合成了一系列吡喃并[3,2- c ]吡啶衍生物3,5-二亚苄基-哌啶-4-一和丙二腈在N,N-二甲基甲酰胺在微波辐射下。构建吡喃并[3,2- c ]吡啶骨架是一种简单,高效,有前途的合成方法。J.杂环化学,(2009)。
Magnetic Graphene Oxide Anchored Sulfonic Acid as a Novel Nanocatalyst for the Synthesis of N-aryl-2-amino-1,6-naphthyridines
Magneticgrapheneoxide functionalized with sulfonicacid (Fe3O4‐GO‐SO3H) was used as a new recyclable nanocatalyst for one‐pot synthesis of N‐aryl‐2‐amino‐1,6‐naphthyridine derivatives under solvent free conditions. The catalyst could be easily recovered from the reaction mixture by an external magnet and reused without significant decrease in activity even after 4 runs. This nanocatalyst exhibited
磺酸功能化的磁性氧化石墨烯(Fe 3 O 4 -GO-SO 3 H)被用作一种新的可回收纳米催化剂,用于在无溶剂条件下一锅法合成N-芳基-2-氨基-1,6-萘啶衍生物。可以容易地通过外部磁体从反应混合物中回收催化剂,并且即使在4次运行后,活性也不会显着降低地重复使用。该纳米催化剂显示出比其他市售磺酸催化剂更好的活性。
Quinine-catalyzed enantioselective tandem conjugate addition/intramolecular cyclization of malononitrile and 1,4-dien-3-ones
作者:Zhi-Peng Hu、Jian Li、Xiao-Gang Yin、Xue-Jing Zhang、Ming Yan
DOI:10.3998/ark.5550190.0014.301
日期:——
An organocatalytic tandemconjugateaddition / intramolecularcyclization of malononitrile and conformationally restricted 1,4-dien-3-ones has been developed. A series of cinchona alkaloids and their derivatives were examined as the catalysts. Quinine was found to be the most efficient catalyst in the absence of any additive. The reaction gave 2-amino-4H-pyrans with high yield and excellent enantiopurity
Diversity Synthesis of N-Substituted 2-Amino-1,6-naphthyridine Derivatives under Microwave Irradiation
作者:Zheng-Guo Han、Chun-Bao Miao、Feng Shi、Ning Ma、Ge Zhang、Shu-Jiang Tu
DOI:10.1021/cc900030e
日期:2010.1.11
A sequential three-component reaction of 3,5-diarylidenepiperidin-4-one, malononitrile, and amine (such as aromatic amine, cyclopropanamine, and NH4OAc) in acetic acid under microwave irradiation has been developed. In this one-pot reaction, a series of new N-substituted 2-amino-1,6-naphthyridine derivatives were synthesized with excellent yields. This method has the advantages of operational simplicity and increased safety for small-scale fast synthesis of N-aryl 2-amino-1,6-naphthyridines for biomedical screening.