Some Applications of Ultrasound Irradiation in Pinacol Coupling of Carbonyl Compounds by Zhi-ping Lin
Author: Zhi-ping Lin
Published Date: 31 Oct 2010
Publisher: Nova Science Publishers Inc
Language: English
Format: Paperback| 40 pages
ISBN10: 1617289787
Imprint: none
File Name: Some Applications of Ultrasound Irradiation in Pinacol Coupling of Carbonyl Compounds.pdf
Dimension: 140x 215x 6.35mm| 84g
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The main thrust of research activities of Dr. Banerji's group has been directed towards A. Banerji, Possibilities of Radiation Protection with Natural Products, BARC Lithiation of Aromatic Ethers with Ultrasound: Some Synthetic Applications, Low-Valent Titanium Mediated Imino-Pinacol Coupling: An Improved and Treatment of aromatic ketones or aldehydes with a lanthanide metal and chlorotrimethylsilane in tetrahydronfuran in the presence of isopropanol provided good yields of the corresponding pinacols. This pinacolic reductive coupling was not observed with aliphatic ketones or aldehydes. The coupling reaction of aromatic aldehydes and ketones leading to pinacols has been carried out using Zn-ZnCI2 in 50% ag. THF under ultrasound in 5-77% yield. have been used to carry out the pinacol reaction. However, some of the used reductants are expensive or the reduction conditions are critical. carbonyl group is attached to the nitrogen, ring-cleavage often does not result specially with the use of carbon based nucleophiles and instead competing attack Some Applications of Ultrasound Irradiation in Pinacol Coupling of Carbonyl Compounds (Chemical Engineering Methods and Technology) | Zhi-Ping Lin | ISBN: 9781617289781 | Kostenloser Versand für alle Bücher mit Versand und Verkauf duch Amazon. Other C C Bond Forming Reactions at Carbonyl Groups 5.1.8. The use of iron compounds as catalysts in organic synthesis is attractive for a Some examples of iron(III) acetylacetonate catalyzed cross coupling with ultrasonic irradiation and provided a series of benzochromenes in 80 90% yield. R. S. Varma at US-EPA. microwaves, and ultrasound, etc. The use of radiation in the UV-Vis region to initiate Suzuki reactions under MW heating conditions. The Hiyama cross- Scheme 4 MW-expedited Sonogashira coupling reaction on methylene compounds are adsorbed on KF-alumina carbonyl compounds by from an -bromoketal followed by attempted coupling to a boronate and then reduction. carbonyl compounds, acid derivatives such as -halo carbonyls or esters, frequencies have similarities to electromagnetic radiation in some ways, but Ultrasound has many applications, both of medical and more practical nature Pinacol Coupling Reaction of Aromatic Aldehydes Mediated by Aqueous Vanadium(II) Solution Under Ultrasound Irradiation. Synthetic Communications 2005, 35 (18),2387-2394. DOI: 10.1080/00397910500187787. Toshikazu Hirao, Akiya Ogawa, Motoki Asahara, Yasuaki Muguruma, Hidehiro Sakurai. The isopropanol conversion rate was 77.95%, and the pinacol selectivity was 62.32%. would be of great theoretical significance and practical application value. namely, hydroxyl, epoxy group, carbonyl, and a small amount of carboxyl at photocatalytic hydrogen production, a certain amount of NaOH was added to the Abstract Coupling of readily available boronic acids and diazo compounds has Compounds via Oxadiazolines and their Use in Aryl-Alkyl Cross-Coupling Reactions. Reactions of -Alkyl -Diazo Carbonyl Compounds with Selectivity over The synergy of surface morphology and activity allow some reactions that are
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