scholarly journals Reduction of benzylic alcohols and α-hydroxycarbonyl compounds by hydriodic acid in a biphasic reaction medium

2012 ◽  
Vol 8 ◽  
pp. 330-336 ◽  
Author(s):  
Michael Dobmeier ◽  
Josef M Herrmann ◽  
Dieter Lenoir ◽  
Burkhard König
Keyword(s):  
Aqueous Solution ◽  
Organic Synthesis ◽  
Reaction Times ◽  
Reaction Medium ◽  
Hydriodic Acid ◽  
Reducing Agent ◽  
Acidic Aqueous Solution ◽  
Keto Ester ◽  
Benzylic Alcohols ◽  
Biphasic Reaction

The synthetic protocol for the reduction of alcohols to hydrocarbons by using hydriodic acid, first described by Kiliani more than 140 years ago, was improved to be more applicable to organic synthesis. Instead of a strongly acidic, aqueous solution, a biphasic toluene–water reaction medium was used, which allowed the conversion of primary, secondary and tertiary benzylic alcohols, in good yields and short reaction times, into the corresponding hydrocarbons. Red phosphorous was used as the stoichiometric reducing agent. Keto, ester, amide or ether groups are tolerated, and catalytic amounts of hydriodic acid (0.2 equiv) in the presence of 0.6 equiv phosphorous are sufficient to achieve conversion.

Quantitative Aerobic Oxidation of Primary Benzylic Alcohols to Aldehydes Catalyzed by Highly Efficient and Recyclable P123-Stabilized Pd Nanoclusters in Acidic Aqueous Solution

ACS Catalysis ◽  
2013 ◽  
Vol 3 (12) ◽  
pp. 3063-3066 ◽  
Author(s):  
Ruirui Dun ◽  
Xueguang Wang ◽  
Mingwu Tan ◽  
Zhen Huang ◽  
Xuemin Huang ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Aerobic Oxidation ◽  
Acidic Aqueous Solution ◽  
Benzylic Alcohols ◽  
Highly Efficient

Ionic Liquids for the Synthesis of Five-Membered N,N-, N,N,N- and N,N,N,NHeterocycles

2019 ◽  
Vol 23 (11) ◽  
pp. 1214-1238 ◽  
Author(s):  
Navjeet Kaur ◽  
Pranshu Bhardwaj ◽  
Meenu Devi ◽  
Yamini Verma ◽  
Neha Ahlawat ◽  
...  
Keyword(s):  
Ionic Liquids ◽  
Organic Synthesis ◽  
Heterocyclic Compounds ◽  
Reaction Medium ◽  
Environmental Issues ◽  
Organic Reaction ◽  
Environment Friendly ◽  
The Past ◽  
Area Of Interest ◽  
Major Subject

Due to special properties of ILs (Ionic Liquids) like their wide liquid range, good solvating ability, negligible vapour pressure, non-inflammability, environment friendly medium, high thermal stability, easy recycling and rate promoters etc. they are used in organic synthesis. The investigation for the replacement of organic solvents in organic synthesis is a growing area of interest due to increasing environmental issues. Therefore, ionic liquids have attracted the attention of chemists and act as a catalyst and reaction medium in organic reaction with high activity. There is no doubt that ionic liquids have become a major subject of study for modern chemistry. In comparison to traditional processes the use of ionic liquids resulted in improved, complimentary or alternative selectivities in organic synthesis. The present manuscript reported the synthesis of multiple nitrogen containing five-membered heterocyclic compounds using ionic liquids. This review covered interesting discoveries in the past few years.

Metal and Non-Metal Catalysts in the Synthesis of Five-Membered S-Heterocycles

2019 ◽  
Vol 16 (2) ◽  
pp. 258-275 ◽  
Author(s):  
Navjeet Kaur
Keyword(s):  
Organic Synthesis ◽  
Biological Activities ◽  
Reaction Times ◽  
Research Field ◽  
Environmentally Benign ◽  
Metal Catalyst ◽  
Efficient Synthesis ◽  
Heterocyclic Molecules ◽  
The Past ◽  
Harsh Conditions

Background:A wide variety of biological activities are exhibited by N, O and S containing heterocycles and recently, many reports appeared for the synthesis of these heterocycles. The synthesis of heterocycles with the help of metal and non-metal catalyst has become a highly rewarding and important method in organic synthesis. This review article concentrated on the synthesis of S-heterocylces in the presence of metal and non-metal catalyst. The synthesis of five-membered S-heterocycles is described here.Objective:There is a need for the development of rapid, efficient and versatile strategy for the synthesis of heterocyclic rings. Metal, non-metal and organocatalysis involving methods have gained prominence because traditional conditions have disadvantages such as long reaction times, harsh conditions and limited substrate scope.Conclusion:The metal-, non-metal-, and organocatalyst assisted organic synthesis is a highly dynamic research field. For ßthe chemoselective and efficient synthesis of heterocyclic molecules, this protocol has emerged as a powerful route. Various methodologies in the past few years have been pointed out to pursue more sustainable, efficient and environmentally benign procedures and products. Among these processes, the development of new protocols (catalysis), which avoided the use of toxic reagents, are the focus of intense research.

Uniaxial magnetization performance of Co-Al2O3 nano-composite films electrochemically synthesized from acidic aqueous solution

2016 ◽  
Vol 20 (6) ◽  
pp. 1665-1672 ◽  
Author(s):  
C. Neetzel ◽  
T. Ohgai ◽  
T. Yanai ◽  
M. Nakano ◽  
H. Fukunaga
Keyword(s):  
Aqueous Solution ◽  
Composite Films ◽  
Nano Composite ◽  
Acidic Aqueous Solution

Chemically modified magnetic chitosan microspheres for Cr(VI) removal from acidic aqueous solution

Particuology ◽  
2016 ◽  
Vol 26 ◽  
pp. 79-86 ◽  
Author(s):  
Xitong Sun ◽  
Qian Li ◽  
Liangrong Yang ◽  
Huizhou Liu
Keyword(s):  
Aqueous Solution ◽  
Acidic Aqueous Solution ◽  
Magnetic Chitosan ◽  
Chitosan Microspheres ◽  
Chemically Modified ◽  
Magnetic Chitosan Microspheres

Gluconic acid aqueous solution: A bio-based catalytic medium for organic synthesis

2021 ◽  
Vol 21 ◽  
pp. 100443
Author(s):  
Han Yin Lim ◽  
Anton V. Dolzhenko
Keyword(s):  
Aqueous Solution ◽  
Organic Synthesis ◽  
Gluconic Acid ◽  
Catalytic Medium ◽  
Acid Aqueous Solution

Complexation thermodynamics of water-soluble calix[4]arene derivatives with lanthanoid(III) nitrates in acidic aqueous solution

2004 ◽  
Vol 414 (1) ◽  
pp. 65-70 ◽  
Author(s):  
Yu Liu ◽  
Hao Wang ◽  
Li-Hua Wang ◽  
Heng-Yi Zhang
Keyword(s):  
Aqueous Solution ◽  
Water Soluble ◽  
Acidic Aqueous Solution ◽  
Complexation Thermodynamics

scholarly journals Adsorption of Copper Ion in Acidic Aqueous Solution Using Rice Bran and Heat Treatment

2008 ◽  
Vol 31 (12) ◽  
pp. 749-754
Author(s):  
Kazuhiro HONDA ◽  
Takayuki YOSHIKAWA ◽  
Tuyoshi SASAKI ◽  
Tadashi SASAMOTO
Keyword(s):  
Heat Treatment ◽  
Aqueous Solution ◽  
Rice Bran ◽  
Copper Ion ◽  
Acidic Aqueous Solution

Mechanism of the reduction of vanadium(V) by titanium(III) in acidic aqueous solution

1973 ◽  
Vol 12 (3) ◽  
pp. 580-584 ◽  
Author(s):  
James P. Birk ◽  
Thomas P. Logan
Keyword(s):  
Aqueous Solution ◽  
Acidic Aqueous Solution
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