scholarly journals Lactams. XIV. cis-trans Isomerization in the 5-ethyl-2-oxo-4-piperidine-acetic acid system under Fischer-Speier esterification conditions.

1978 ◽  
Vol 26 (7) ◽  
pp. 2253-2257 ◽  
Author(s):  
TOZO FUJII ◽  
SHIGEYUKI YOSHIFUJI
Keyword(s):  
Acetic Acid ◽  
Acid System ◽  
Trans Isomerization

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.

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

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%.

Partial Oxidation of 4-tert-Butyltoluene Catalyzed by Homogeneous Cobalt and Cerium Acetate Catalysts in the Br−/H2O2/Acetic Acid System: Insights into Selectivity and Mechanism

2007 ◽  
Vol 13 (28) ◽  
pp. 8037-8044 ◽  
Author(s):  
Leon G. A. van de Water ◽  
Arati Kaza ◽  
James K. Beattie ◽  
Anthony F. Masters ◽  
Thomas Maschmeyer
Keyword(s):  
Acetic Acid ◽  
Partial Oxidation ◽  
Acid System
Sign in / Sign up

Export Citation Format

Share Document