scholarly journals Chitosan-encapsulated manganese ferrite particles bearing sulfonic acid group catalyzed efficient synthesis of spiro indenoquinoxalines

RSC Advances ◽  
2020 ◽  
Vol 10 (55) ◽  
pp. 33334-33343 ◽  
Author(s):  
Sepideh Lahouti ◽  
Hossein Naeimi
Keyword(s):  
Sulfonic Acid ◽  
Acid Group ◽  
Sulfonic Acid Group ◽  
Manganese Ferrite ◽  
Efficient Synthesis ◽  
One Pot

A simply, highly versatile and efficient synthesis of 5-phenyl-spiro [diindeno pyridineindenoquinoxaline]-diones is achieved through five component one pot reaction of ninhydrin, 1,2-diaminobenzene, 1,3-indandione and anilines.

scholarly journals ONE-POT SYNTHESIS OF SULFONIC ACID GROUP-CONTAINING HYPERBRANCHED POLYURETHANE

2012 ◽  
Vol 012 (7) ◽  
pp. 766-770
Author(s):  
Hua-yu Lin ◽  
Li-fen Kong ◽  
Hui Liang ◽  
Jiang Lu
Keyword(s):  
Sulfonic Acid ◽  
Acid Group ◽  
Sulfonic Acid Group ◽  
One Pot ◽  
One Pot Synthesis ◽  
Hyperbranched Polyurethane

Preparation and polymerization of isopropenyl-1,3,5-triazine containing sulfonic acid group.

1986 ◽  
Vol 43 (9) ◽  
pp. 573-579
Author(s):  
Yasuo YUKI ◽  
Hideo KUNISADA ◽  
Tomohiko NOMURA
Keyword(s):  
Sulfonic Acid ◽  
Acid Group ◽  
Sulfonic Acid Group

Sulfonic Acid Group Determination in Lignosulfonates by Headspace Gas Chromatography

2018 ◽  
Vol 6 (5) ◽  
pp. 6240-6246 ◽  
Author(s):  
Philipp Korntner ◽  
Andreas Schedl ◽  
Ivan Sumerskii ◽  
Thomas Zweckmair ◽  
Arnulf Kai Mahler ◽  
...  
Keyword(s):  
Gas Chromatography ◽  
Sulfonic Acid ◽  
Acid Group ◽  
Headspace Gas Chromatography ◽  
Sulfonic Acid Group ◽  
Headspace Gas

Subsidiary Colors in FD&C Blue No. 1

1969 ◽  
Vol 52 (1) ◽  
pp. 34-40 ◽  
Author(s):  
Charles Stein
Keyword(s):  
Thin Layer ◽  
Thin Layer Chromatography ◽  
Sulfonic Acid ◽  
Acid Group ◽  
Sulfonic Acid Group ◽  
Layer Chromatography

Abstract The subsidiary colors in commercial FD&C Blue No. 1 have been identified by thin layer chromatography. They consist of dyes formed by the loss of one sulfonic acid group or of one sulfonated benzyl group from FD&C Blue No. 1.

Reactions of SO2X mono-substituted arenes with SO3 in nitromethane: electronic and steric directing effects of the sulfonic acid group and some model substituents

1993 ◽  
Vol 71 (2) ◽  
pp. 210-215 ◽  
Author(s):  
Harold R. W. Ansink ◽  
Erik J. De Graaf ◽  
Erwin Zelvelder ◽  
Hans Cerfontain
Keyword(s):  
Sulfonic Acid ◽  
Sulfur Trioxide ◽  
Reaction Rates ◽  
Acid Group ◽  
Sulfonic Acid Group ◽  
Order Of Magnitude ◽  
Directing Effect ◽  
Naphthalene Series ◽  
Benzene Series

The sulfonation of benzene-SO2X (X = CH3, OCH3, OH, and Cl) and of 1- and 2-naphthalene-SO2X (X = CH3, OCH3, and Cl) with sulfur trioxide in nitromethane as solvent has been studied. In the benzene series, substitution only occurs at the 3-position irrespective of X; the reaction rates, which are all within the same order of magnitude, are low. Upon sulfonation of the 1-SO2X-substituted naphthalenes, the main sulfonation product (58–80%) is the 5-sulfonic acid (5-S); in addition, 6-S and small amounts of 3-S and 7-S are formed. Also, the formation of the intermolecular sulfonic anhydride of 1-(methylsulfonyl)naphthalene-5-S is observed. The 2-SO2X-substituted naphthalenes all yield the 5-S and 8-S in a ratio of [Formula: see text] For both the benzene and naphthalene series, insertion of SO3 between the SO2 and X moieties of the chlorosulfonyl and methoxysulfonyl substituents proper takes place. In the benzene series these reactions are fast as compared with the actual ring sulfonation, whereas in the naphthalene series they are, in general, relatively slow. In the naphthalene series the mesomeric directing effect of the SO2X groups is less important than in the benzene series; the "naphthalene α-effect" also plays an important role.

Efficient Synthesis 2,3-Dihydroquinazolin-4(1H)-Ones Using Coconut Shell Char Sulfonic Acid as a Reusable Catalyst in Ethanol

2014 ◽  
Vol 989-994 ◽  
pp. 83-86
Author(s):  
Xuan Yan Liu ◽  
Zhi Gao Yang
Keyword(s):  
Sulfonic Acid ◽  
Biginelli Reaction ◽  
Acid Catalyst ◽  
Coconut Shell ◽  
Reusable Catalyst ◽  
Efficient Synthesis ◽  
One Pot ◽  
Efficient Catalyst ◽  
Three Component Reaction ◽  
High Yields

3,4-Dihydropyrimidin-2(1H)-ones derivatives were synthesized in moderate to high yields in one-pot three component reaction from the corresponding aldehydes, 1,3-dicarbonyl compounds and urea, Coconut shell char sulfonic acid (CSCSA) used as a reusable, and efficient catalyst. Compared to the classical acid catalyst, This new protocol for the Biginelli reaction includes the following important features: excellent yields, non-toxic, inexpensive and easily available reagent.

Ionic liquid/H2O-mediated synthesis of mesoporous organic polymers and their application in methylation of amines

2017 ◽  
Vol 53 (44) ◽  
pp. 5962-5965 ◽  
Author(s):  
Xiaoxiao Yu ◽  
Zhenzhen Yang ◽  
Hongye Zhang ◽  
Bo Yu ◽  
Yanfei Zhao ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Sulfonic Acid ◽  
Acid Group ◽  
Sulfonic Acid Group ◽  
Organic Polymers ◽  
Functionalized Ionic Liquid ◽  
Troger's Base

Mesoporous Tröger's base-functionalized organic polymers were prepared using a sulfonic acid group functionalized ionic liquid/H2O system without any templates and surfactants.

Preparation of Biodiesel from Tung Oil Catalyzed by Sulfonic-Functional Brǒnsted Acidic Ionic Liquids

2011 ◽  
Vol 314-316 ◽  
pp. 1459-1462 ◽  
Author(s):  
Jian Hui Zhou ◽  
Yu Jing Lu ◽  
Bao Hua Huang ◽  
Yan Ping Huo ◽  
Kun Zhang
Keyword(s):  
Catalytic Activity ◽  
Ionic Liquids ◽  
Sulfonic Acid ◽  
Acid Group ◽  
Sulfonic Acid Group ◽  
Tung Oil ◽  
Acidic Ionic Liquids ◽  
Good Catalytic Activity

Preparation of biodiesel from tung oil catalyzed by five Brǒnsted acidic ionic liquids (ILs) with propyl sulfonic acid group was investigated. These ILs show good catalytic activity for the transeserification of tung oil. Among these ILs, [C3SO3Hmim]HSO4 showed a highest catalytic activity. In addition, these ionic liquids had a good reusability and could be easily separated from the biodiesel.

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