Behavior of Acid-Base Indicators in Acetic Acid System

1956 ◽  
Vol 28 (7) ◽  
pp. 1120-1130 ◽  
Author(s):  
Takeru. Higuchi ◽  
J. A. Feldman ◽  
C. R. Rehm
Keyword(s):  
Acetic Acid ◽  
Acid System ◽  
Acid Base

Solvent effect on acid–base clustering between acetic acid and pyridine

1998 ◽  
pp. 95-100 ◽  
Author(s):  
Yoshikatsu Akiyama ◽  
Akihiro Wakisaka ◽  
Fujio Mizukami ◽  
Kengo Sakaguchi
Keyword(s):  
Acetic Acid ◽  
Solvent Effect ◽  
Acid Base

scholarly journals Zirconia catalysed acetic acid ketonisation for pre-treatment of biomass fast pyrolysis vapours

2018 ◽  
Vol 8 (4) ◽  
pp. 1134-1141 ◽  
Author(s):  
Hessam Jahangiri ◽  
Amin Osatiashtiani ◽  
James A. Bennett ◽  
Mark A. Isaacs ◽  
Sai Gu ◽  
...  
Keyword(s):  
Acetic Acid ◽  
Lewis Acid ◽  
Fast Pyrolysis ◽  
Acid Sites ◽  
Active Species ◽  
Acid Base ◽  
Lewis Acid Sites ◽  
Base Pairs ◽  
Pre Treatment ◽  
Biomass Fast Pyrolysis

Weak Lewis acid sites (and/or resulting acid–base pairs) on monoclinic ZrO2 are identified as the active species responsible for acetic acid ketonisation to acetone.

Suzuki–Miyaura Cross-Couplings under Acidic Conditions

Synthesis ◽  
2019 ◽  
Vol 52 (06) ◽  
pp. 882-892
Author(s):  
Lucas Pruschinski ◽  
Ana-Luiza Lücke ◽  
Tyll Freese ◽  
Sean-Ray Kahnert ◽  
Sebastian Mummel ◽  
...  
Keyword(s):  
Acetic Acid ◽  
Reaction Time ◽  
Sodium Carbonate ◽  
Acid Water ◽  
Reaction Parameters ◽  
Acid Base ◽  
Acetic Acid Water ◽  
Acidic Conditions ◽  
Carbonate Reaction

Suzuki–Miyaura reactions with Pd(PPh3)4 have been carried out using lithium N-phenylsydnone-4-carboxylate as additive, which gave best yields at pH 5.7 in a mixture of acetic acid, water, and sodium carbonate. Reaction parameters such as the Pd source, the solvent, reaction time and temperature, acid, base and carboxylate have been varied and some representative examples of the Suzuki–Miyaura reaction have been examined.

Direct Synthesis of 6H-Chromeno[3,4-b]quinolin-6-ol Derivatives from Substituted 3-Nitro-2H-chromenes and 2-Nitrobenzaldehydes Mediated by Fe/AcOH System

Synthesis ◽  
2017 ◽  
Vol 50 (06) ◽  
pp. 1350-1358 ◽  
Author(s):  
Cunde Wang ◽  
Xushun Qing ◽  
Ting Wang ◽  
Chenlu Dai ◽  
Zhenjie Su
Keyword(s):  
Acetic Acid ◽  
Nucleophilic Addition ◽  
Aldol Condensation ◽  
Direct Synthesis ◽  
Reductive Cyclization ◽  
Quinoline Derivatives ◽  
Acid System ◽  
X Ray ◽  
X Ray Crystallography ◽  
Sequential Reduction

An efficient iron/acetic acid system-mediated reductive cyclization reaction of substituted 2-aryl-3-nitro-2H-chromenes with substituted 2-nitrobenzaldehydes for the synthesis of 6-aryl-6H-chromeno[3,4-b]quinolines was developed. This reaction involves the sequential reduction, hydrolysis, aldol condensation, intramolecular addition, and the nucleophilic addition of substituted 2-aryl-3-nitro-2H-chromenes with substituted 2-nitrobenzaldehydes to give the corresponding 6H-chromeno[3,4-b]quinolines. This transformation provides a straightforward synthetic protocol for constructing substituted 6H-chromeno[3,4-b]quinoline derivatives. The structures of three typical products were confirmed by X-ray crystallography.

Improved D-Glucosamine Hydrochloride Preparation from Waste Hypha Residue of Citric Acid

2013 ◽  
Vol 864-867 ◽  
pp. 545-548
Author(s):  
Xiao Ling Sun ◽  
Zhi Tan ◽  
Ying Jiang ◽  
Min Yue Xu
Keyword(s):  
Acetic Acid ◽  
Statistical Analysis ◽  
Citric Acid ◽  
Acid System ◽  
Optimal Conditions ◽  
Orthogonal Array Design ◽  
Experimental Conditions ◽  
Array Design ◽  
Glucosamine Hydrochloride ◽  
Hcl Concentration

The improved preparation of D-glucosamine hydrochloride from waste hypha residue of citric acid was reported. The use of HCl and acetic acid system as an acid hydrolysis reagent led to a significant increase in the yield of D-Glucosamine hydrochloride (GluHCl). Other effects of various factors on the preparation of GluHCl were also investigated: temperature of acidification, HCl concentration, and reaction time. The experimental conditions were optimized by a L9 (34) orthogonal array design (OAD) with four factors at three levels using statistical analysis. Under optimal conditions, the yield of GluHCl reached 5.2%.

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