Organocatalytic mediated green approach: A versatile new <scp>L</scp>-valine promoted synthesis of diverse and densely functionalized 2-amino-3-cyano-4H-pyrans
new L-valine promoted facile and versatile green synthesis of diversified 2-amino-3-cyano-4H-pyrans using a one pot multicomponent-tandem reaction of aromatic aldehydes, malononitrile, and diverse electron-rich enolizable carbonyl compounds is described. To the best of our knowledge this is the first report on the use of native L-valine as a catalyst in organic synthesis. Environmental friendly, mild
Base free synthesis of iron oxide supported on boron nitride for the construction of highly functionalized pyrans and spirooxindoles
作者:Aniruddha Molla、Sahid Hussain
DOI:10.1039/c5ra21969h
日期:——
BN@Fe3O4 network was synthesized via chemical reduction followed by aerial oxidation in absence of base and was subsequently used for the synthesis of highly functionalized pyrans and spirooxindoles derivatives on water.
Amine-functionalized hyper-crosslinked polyphenanthrene as a metal-free catalyst for the synthesis of 2-amino-tetrahydro-4 H -chromene and pyran derivatives
作者:Reddi Mohan Naidu Kalla、Anuraj Varyambath、Mi Ri Kim、Il Kim
DOI:10.1016/j.apcata.2017.03.009
日期:2017.5
the polymerization of phenanthrene using bromomethyl methyl ether as a bridging agent in the absence of any templates. The organic spheres were subjected to amine-functionalizing on the periphery of them using unreacted bromomethyl groups. The amine-functionalized microporous polyphenthrene could be employed as a highly effective and stable solid basic catalyst for the syntheses of functionalized 2-
Green synthesis and antibacterial, antifungal activities of 4H-pyran, tetrahydro-4H-chromenes and spiro2-oxindole derivatives by highly efficient Fe3O4@SiO2@NH2@Pd(OCOCH3)2 nanocatalyst
catalytic performance of this environmentally benign nanocatalyst was investigated in the one-pot multicomponent synthesis of biologically important 2-amino-3-cyano-4H-pyran, tetrahydro-4H-chromenes and spiro2-oxindole derivatives. The reaction was simply achieved via one-pot three-component reaction of arylaldehydes, malononitrile and dimedone/isatins/methylaceto acetate ethanol at room temperature,
一种高效、磁性可回收的 Fe 3 O 4 @SiO 2 @NH 2 @Pd(OCOCH 3 ) 2通过扫描电子显微镜(SEM)、透射电子显微镜(TEM)、能量色散X射线光谱(EDX)、傅里叶变换红外光谱(FT-IR)、和功率 X 射线衍射。此后,在生物学上重要的 2-氨基-3-氰基-4H-吡喃、四氢-4H-色烯和螺2-羟吲哚衍生物的一锅多组分合成中研究了这种环境友好型纳米催化剂的催化性能。该反应是通过芳醛、丙二腈和二甲酮/靛红/乙酰乙酸甲酯乙醇在室温下的一锅三组分反应实现的,收率高,纯度高。一种新的催化体系,反应介质的可回收性,
A collection of pyrano[3,2-c] chromene, 4H-chromene and 4H-pyran were synthesized in excellent yield employing an innocuous, inexpensive and naturally occurring borax-catalyzed multicomponent domino reaction. The present protocol offers advantages in terms of higher yields, short reactions time and no workup and no column chromatography.