HETEROCYCLES
An International Journal for Reviews and Communications in Heterocyclic ChemistryWeb Edition ISSN: 1881-0942
Published online by The Japan Institute of Heterocyclic Chemistry
Regular Issue
Vol. 22, No. 4, 1984
Published online:
■ Isolation of 1,2-Dihydroxy-4-glucosyloxynaphthalene from Lawsonia Innermis
Muhammad Afzal,* Galib Al-Oriquat, Jassim M. Al-Hassan, and Nazar Muhammad
*Biochemistry Department, Kuwait University, Safat 13060, P.O. Box 5969, Kuwait
Abstract
Isolation and characterization of 1,2-dihydroxy-4-glucosyloxynaphthalene from L. innermis are described for the first time.
Published online:
■ Free Radical Transformations of Cyclic Acetals
Dilyus Lutfullich Rakhmankulov,* Vladimir Viktorovich Zorin, Eugeni Valerievich Pastushenko, and Semen Solomonovich Zlotsky
*Ufa Oil Institute, Kosmonavtov Str., 1, Ufa, 450062, Russia
Abstract
Information of structure and properties of free radicals generated from cyclic acetals in reactions, which take place with their participation, is given. Data of kinetics and mechanism of chain-radical liquid-phase transformations of cyclic acetals are summarized and discussed. Possibilities and perspectives of using homolytical reactions of cyclic acetals in organic synthesis are shown.
Published online:
■ Synthetic Approaches to the Hunteria Alkaloids
Atta-ur-Rahman* and Mumtaz Sultana
*H. E. J. Postgraduate Institute of Chemistry, University of Karachi, Karachi-75270, Pakistan
Abstract
Synthetic approaches to the Hunteria alkaloids are reviewed.
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■ Heterocyclic Synthesis by Methal Carbonyl Induced Cyclization Reaction
Yoshiki Ohshiro* and Toshikazu Hirao
*Department of Applied Chemistry, Faculty of Engineering, Osaka University, 2-1 Yamadaoka, Toyonaka, Osaka 560-0043, Japan
Abstract
Metal carbonyl induced cyclization reactions provide useful methods for heterocyclic synthesis. This review surveys their recent progress.
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■ Arene Syntheses by Dehydration of 7-Oxabicyclo[2.2.1]heptene Systems
Henry N. C. Wong,* Tang-Kei Ng, Tai-Yuen Wong, and Yi De Xing
*Department of Chemistry, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, Hong Kong
Abstract
Aromatization by dehydration of 7-oxabicyclo[2.2.1]heptene systems is an efficient method, which would provide benzene, nepthalene, anthracene as well as phenanthrene derivatives in acceptable yields.
Published online:
■ The Role of Lone Pair Interactions in the Chemistryof the Anomeric Centre of Monosaccharides
Vernon G. S. Box*
*Department of Chemistry, Mona Campus, University of the West Indies, Mona, Kingston 7, Jamaica
Abstract
The interactions of the lone pair orbitals of 0-5 with the lone pair orbitals, or empty orbitals, of substituents on the anomeric carbon (C-1) are reviewed and these interactions are shown to be of great importance in the anomeric effect, the reverse anomeric effect and the reactions at the anomeric centre of monosaccharides.