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Molecules, Volume 4, Issue 12 (December 1999) – 7 articles , Pages 338-372, Articles M125-M126

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Book Review
Industrial Organic Chemicals. Starting Materials and Intermediates
by Shu-Kun Lin
Molecules 1999, 4(12), 371-372; https://doi.org/10.3390/41200371 - 31 Dec 1999
Cited by 4 | Viewed by 4646
Abstract
The encyclopedia of Industrial Organic Chemicals brings together around 200 detailed and thoroughly edited articles on organic starting materials and intermediates.[...] Full article
8 KiB  
Book Review
Ullmann’s Encyclopedia of Industrial Chemistry. CD-ROM. 6th Edition 1999 Electronic Release
by Shu-Kun Lin
Molecules 1999, 4(12), 368-370; https://doi.org/10.3390/41200368 - 31 Dec 1999
Cited by 2 | Viewed by 6943
Abstract
When I was being trained in dyestuff research, development and production at Ciba-Geigy in 1994, my supervisors as senior dyestuff chemists, brought to my attention the Ullmann’s Encyclopedia of Industrial Chemistry.[...] Full article
6 KiB  
Book Review
Molecular Catenanes, Rotaxanes and Knots. A Journey Through the World of Molecular Topology. Edited by J.-P. Sauvage
by Shu-Kun Lin
Molecules 1999, 4(12), 366-367; https://doi.org/10.3390/41200366 - 31 Dec 1999
Cited by 2 | Viewed by 4532
Abstract
The parts of a molecule are connected by chemical bonds such as the covalent bond, the ionic bond, the hydrogen bond, etc.[...] Full article
96 KiB  
Short Note
N-{2-[(2-Oxo-2H-chromen-4-yl)amino]ethyl}acetamide
by Stoyan K. Karagiosov, Ivo C. Ivanov and Boyan I. Iliev
Molecules 1999, 4(12), M126; https://doi.org/10.3390/M126 - 17 Dec 1999
Cited by 4 | Viewed by 2983
Abstract
The direct synthesis of 4-(monoalkylamino)coumarins from primary amines [1] was developed on the basis of the reaction of 4-hydroxycoumarin with ammonium acetate in acetic acid as reported by Joshi et al. [2].[...] Full article
(This article belongs to the Section Molbank Section of Molecules, 1997-2001)
91 KiB  
Short Note
6-Methyl-3-nitroso-1-phenethyl-4-(phenethylamino)-2(1H)-pyridinone
by Edmont V. Stoyanov and Ivo C. Ivanov
Molecules 1999, 4(12), M125; https://doi.org/10.3390/M125 - 17 Dec 1999
Viewed by 2665
Abstract
In the course of our recent studies on the reactivity of some 4-amino-2-pyridones [1-3] we accomplished the nitrosation of the N,N-disubstituted 4-amino-2-pyridone 2.[...] Full article
(This article belongs to the Section Molbank Section of Molecules, 1997-2001)
83 KiB  
Article
Teaching NMR Using Online Textbooks
by Joseph P. Hornak
Molecules 1999, 4(12), 353-365; https://doi.org/10.3390/41200353 - 1 Dec 1999
Cited by 3 | Viewed by 8087
Abstract
Nuclear magnetic resonance (NMR) spectroscopy has almost become an essential analytical tool for the chemist. High-resolution one- and multi-dimensional NMR, timedomain NMR, and NMR microscopy are but a few of the NMR techniques at a chemist's disposal to determine chemical structure and dynamics. [...] Read more.
Nuclear magnetic resonance (NMR) spectroscopy has almost become an essential analytical tool for the chemist. High-resolution one- and multi-dimensional NMR, timedomain NMR, and NMR microscopy are but a few of the NMR techniques at a chemist's disposal to determine chemical structure and dynamics. Consequently, even small chemistry departments are finding it necessary to provide students with NMR training and experience in at least some of these techniques. The hands-on experience is readily provided with access to state-of-the-art commercial spectrometers. Instruction in the principles of NMR is more difficult to achieve as most instructors try to teach NMR using single organic or analytical chemistry book chapters with static figures. This paper describes an online textbook on NMR spectroscopy called The Basics of NMR (http://www.cis.rit.edu/htbooks/nmr/) suitable for use in teaching the principles of NMR spectroscopy. The book utilizes hypertext and animations to present the principles of NMR spectroscopy. The book can be used as a textbook associated with a lecture or as a stand-alone teaching tool. Conference participants are encouraged to review the textbook and evaluate its suitability for us in teaching NMR spectroscopy to undergraduate chemistry majors. Full article
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221 KiB  
Article
X-Ray Crystal Structure of 10β-Hydroxy-4β,5β-epoxyestr-1-en-3,17-dione and Antitumor Activity of its Congeners
by Dragana R. Milić, Agneš Kapor, Borislava Markov, Bela Ribar, Marianne Strümpel, Zorica Juranić, Miroslav J. Gašić and Bogdan A. Šolaja
Molecules 1999, 4(12), 338-352; https://doi.org/10.3390/41200338 - 23 Nov 1999
Cited by 9 | Viewed by 7915
Abstract
Based on the biological properties of epoxyquinols from natural sources, the title compound was synthesised as a potential antitumor agent. Its molecular structure was partially confirmed by NMR studies. The detailed structure was established by X-ray analysis revealing two symmetry independent molecules in [...] Read more.
Based on the biological properties of epoxyquinols from natural sources, the title compound was synthesised as a potential antitumor agent. Its molecular structure was partially confirmed by NMR studies. The detailed structure was established by X-ray analysis revealing two symmetry independent molecules in the asymmetric unit each consisting of four fused rings with the C(10) β-oriented hydroxy group and β-oriented O atom bridging C(4) and C(5). The conformation of A ring in both conformers A and B is boat (B3,6), while rings B and C are chairs (1C4) and the five-membered D ring is in an envelope (E2) conformation. The in vitro antitumor activity of title compound and its 17b-acetoxy analogue against HeLa and Fem-x cells revealed IC50 values of 5.7 and 7.1 mM, and 2.25 and 1.58 mM, respectively. Corresponding quinols were tested on 47 cell lines with 10b-hydroxy-17β-acetoxyestra-1,4-dien-3-one being most active against leukemia SR cells (GI50 = 0.17 mM). Full article
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