Aminopropyl coated on magnetic Fe<sub>3</sub>O<sub>4</sub>and SBA-15 nanoparticles catalyzed mild preparation of chromeno[2,3-d]pyrimidines under ambient and solvent-free conditions
作者:Hamid Reza Shaterian、Morteza Aghakhanizadeh
DOI:10.1039/c2cy20543b
日期:——
3-Aminopropyltriethoxysilane coated on magnetic Fe3O4 nanoparticles [APTES-MNPs] and 3-aminopropyltriethoxysilane coated on SBA-15 [APTES-(SBA-15)] catalyzed efficiently the one-pot pseudo four-component reaction of salicylaldehydes, malononitrile and secondary amines for preparation of chromeno[2,3-d]pyrimidines under solvent-free conditions at room temperature. The catalysts show environmentally benign character, which can be easily prepared, stored, and recovered without obvious significant loss of activity.
Sodium Formate-Catalyzed One-Pot Synthesis of Benzopyranopyrimidines and 4-Thio-substituted 4<i>H</i>-Chromenes via Multicomponent Reaction at Room Temperature
作者:Goutam Brahmachari、Suvankar Das
DOI:10.1002/jhet.2123
日期:2015.5
A simple, straightforward and highly efficientmulticomponentone‐potsynthesis of a series of pharmaceutically interesting benzopyranopyrimidine and 4H‐chromene derivatives has been developed on the basis of low‐cost and environment‐friendly sodium formate catalyst via tandem reactions of salicylic aldehydes, malononitrile, and cyclic secondary amines in ethanol at room temperature. Nature of nucleophile
通过水杨醛,丙二腈的串联反应,在低成本,环境友好的甲酸钠催化剂的基础上,开发了一种简单,直接,高效的多组分一锅法合成一系列有趣的苯并吡喃并嘧啶和4 H-色烯衍生物。以及室温下在乙醇中的环状仲胺。该反应中所用亲核试剂的性质决定了反应的过程。环状仲胺导致苯并吡喃并[2,3- d ]嘧啶的形成,而苯硫酚则提供相应的4-硫取代的4 H色烯在相同的反应条件下。高原子经济性,高收率,生态友好和温和的反应条件是该方案的重要特征。
Mild preparation of chromeno[2,3-d]pyrimidines catalyzed by Brønsted acidic ionic liquids under solvent-free and ambient conditions
作者:Hamid Reza Shaterian、Morteza Aghakhanizadeh
DOI:10.1007/s11164-012-0889-y
日期:2013.10
Brønsted acidic ionic liquids, namely 2-pyrrolidonium hydrogensulfate, N-methyl-2-pyrrolidonium hydrogensulfate, N-methyl-2-pyrrolidonium dihydrogenphosphate, (4-sulfobutyl)tris(4-sulfophenyl)phosphonium hydrogensulfate, triphenyl(propyl-3-sulfonyl)phosphonium toluenesulfonate, l-prolinium sulfate, and l-prolinium nitrate, catalyzed efficient one-pot pseudo-four-component reaction of salicylaldehydes, malononitrile, and secondary amine for preparation of chromeno[2,3-d]pyrimidines under solvent-free conditions at room temperature. The catalysts show environmentally benign character and can be easily prepared, stored, and recovered without obvious significant loss of activity.
An Efficient One-Pot and Solvent-Free Synthesis of Chromeno[2,3-d]pyrimidine Derivatives: Microwave Assisted Reaction
作者:Afsaneh Zonouzi、Mojtaba Biniaz、Roghieh Mirzazadeh、Merzieh Talebi、Seik Weng Ng
DOI:10.3987/com-10-11929
日期:——
An efficient synthesis of sonic new chromeno[2,3-d]pyrimidine derivatives has been described by a solvent-free, multi-component reaction in fairly high yields.