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Table of Contents

Molecules, Volume 5, Issue 2 (February 2000), Pages 99-199, M134-M143

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	M134 Margaret A. Brimble and Josephine S. O. Park Short Note: (6bR*,9aR*)-6-(2-Benzyloxy-1-oxoethyl)-6b,9a-dihydro-5-hydroxy- 4-methoxyfuro[3,2-b]naphtho[2,1-d]furan-8(9H)-one Molecules 2000, 5(2), M134; doi:10.3390/M134 Received: 20 January 2000 / Accepted: 2 February 2000 / Published: 23 February 2000 Show/Hide Abstract | Download PDF Full-text (93 KB) |  Abstract: n/a (This article belongs to the Section Molbank Section of Molecules, 1997-2001)
	M135 Margaret A. Brimble and Josephine S. O. Park Short Note: 3-[5-(tert-Butyldimethylsilyloxy)-3-p-nitrobenzoyl-1-oxo- 2-(phenylmethoxy)hexyl]-4-(phenylmethyl)-2-oxazolidinone Molecules 2000, 5(2), M135; doi:10.3390/M135 Received: 20 January 2000 / Accepted: 2 February 2000 / Published: 23 February 2000 Show/Hide Abstract | Download PDF Full-text (93 KB) |  Abstract: n/a (This article belongs to the Section Molbank Section of Molecules, 1997-2001)
	M136 Margaret A. Brimble and Josephine S. O. Park Short Note: 3-[5-(tert-Butyldimethylsilyloxy)-3-(3,5-dinitrobenzoyl)-1-oxo- 2-(phenylmethoxy)hexyl]-4-(phenylmethyl)-2-oxazolidinone Molecules 2000, 5(2), M136; doi:10.3390/M136 Received: 20 January 2000 / Accepted: 2 February 2000 / Published: 23 February 2000 Show/Hide Abstract | Download PDF Full-text (93 KB) |  Abstract: n/a (This article belongs to the Section Molbank Section of Molecules, 1997-2001)
	M137 Margaret A. Brimble and Josephine S. O. Park Short Note: (4R,2'R,3'R,5'R)-3-[5-(tert-Butyldimethylsilyloxy)-1-oxo- 2,3-bis(phenylmethoxy)hexyl]-4-(phenylmethyl)-2-oxazolidinone Molecules 2000, 5(2), M137; doi:10.3390/M137 Received: 20 January 2000 / Accepted: 2 February 2000 / Published: 23 February 2000 Show/Hide Abstract | Download PDF Full-text (92 KB) |  Abstract: n/a (This article belongs to the Section Molbank Section of Molecules, 1997-2001)
	M138 Margaret A. Brimble and Josephine S. O. Park Short Note: (4R,2'R,3'R,5'R)-3-[3,5-Bis(tert-butyldimethylsilyloxy)-1-oxo- 2-(phenylmethoxy)hexyl]-4-(phenylmethyl)-2-oxazolidinone Molecules 2000, 5(2), M138; doi:10.3390/M138 Received: 20 January 2000 / Accepted: 2 February 2000 / Published: 23 February 2000 Show/Hide Abstract | Download PDF Full-text (94 KB) |  Abstract: n/a (This article belongs to the Section Molbank Section of Molecules, 1997-2001)
	M140 Bohumil Steiner, Jan Gajdos and Miroslav Koos Short Note: (4R)-1'-Acetyl-2,3-O-isopropylidene-methylspiro [4,6-dideoxy-ß-D-ribo-hexopyranosid-4,5'-imidazolidin]-2',4'-dione Molecules 2000, 5(2), M140; doi:10.3390/M140 Received: 17 January 2000 / Accepted: 7 February 2000 / Published: 23 February 2000 Show/Hide Abstract | Download PDF Full-text (97 KB) |  Abstract: n/a (This article belongs to the Section Molbank Section of Molecules, 1997-2001)
	M141 Marina A. Tlekhusezh, Roman V. Makuilov and Larisa A. Badovskaya Short Note: 3-Benzyl-4-(N-benzylcarbamoylmethyl)-2-(3-pyridyl)-1,3-oxazolidine Molecules 2000, 5(2), M141; doi:10.3390/M141 Received: 1 February 2000 / Accepted: 8 February 2000 / Published: 23 February 2000 Show/Hide Abstract | Download PDF Full-text (89 KB) |  Abstract: n/a (This article belongs to the Section Molbank Section of Molecules, 1997-2001)
	M142 Lyudmila N. Sorotskaya, Tat'yana Ya. Kaklyugina and Larisa A. Badovskaya Short Note: 4-(5-Methyl-2-furfuryl)iden-2-furfurylaminobutanolide Molecules 2000, 5(2), M142; doi:10.3390/M142 Received: 1 February 2000 / Accepted: 7 February 2000 / Published: 23 February 2000 Show/Hide Abstract | Download PDF Full-text (91 KB) |  Abstract: n/a (This article belongs to the Section Molbank Section of Molecules, 1997-2001)
	M143 Lajos Kovács and Péter Forgó Short Note: Ethyl 2-(n-Butylamino)-7-hydroxy-5-methylpyrazolo[1,5-a]pyrimidine-3-carboxylate Molecules 2000, 5(2), M143; doi:10.3390/M143 Received: 20 January 2000 / Accepted: 8 February 2000 / Published: 23 February 2000 Show/Hide Abstract | Download PDF Full-text (22 KB) |  Abstract: n/a (This article belongs to the Section Molbank Section of Molecules, 1997-2001)
	p. 99-113 Z. M. Nofal, M. I. El-Zahar and S. S. Abd El-Karim Article: Novel Coumarin Derivatives with Expected Biological Activity Molecules 2000, 5(2), 99-113; doi:10.3390/50200099 Received: 13 August 1999 / Accepted: 20 October 1999 / Published: 16 February 2000 Show/Hide Abstract | Download PDF Full-text (101 KB) Abstract: A number of novel 3-bromo-4-methyl-7-methoxy-8-amino substituted coumarins and 2-substituted 7-bromo-6-methyl-8H-pyrano-benzimidazoles, benzoxazoles and/or benzoxazine-8-ones were synthesized for the purpose of pharmacological evaluation. Some representative compounds showed antitumor activity in vitro on Ehrlich ascites carcinoma in the preliminary testing.
	p. 114-117 Edward J. Parish, Hang Sun, Stephen Kizito and Terrence L. Boos Article: An Improved Synthesis of 3b-Acetoxy-lanost-8-en-24-one (24-Ketolanosteryl Acetate) Molecules 2000, 5(2), 114-117; doi:10.3390/50200114 Received: 29 November 1999 / Accepted: 10 January 2000 / Published: 11 February 2000 Show/Hide Abstract | Download PDF Full-text (30 KB) Abstract: The oxidation of a borane intermediate by PFC provides a convenient synthesis of 24-ketolanosteryl acetate.
	p. 118-126 Dragana R. Milić, Dejan M. Opsenica, Borivoje Adnađević and Bogdan A. Šolaja Article: NaY Zeolite: A Useful Catalyst for Nitrile Hydrolysis Molecules 2000, 5(2), 118-126; doi:10.3390/50200118 Received: 2 August 1999 / Accepted: 31 December 1999 / Published: 12 February 2000 Show/Hide Abstract | Download PDF Full-text (51 KB) Abstract: The NaY zeolite catalysed hydrolysis of nitriles to primary amides is reported. It is found that aryl nitriles with strong electron-withdrawing substituents and cyanopyridines are readily hydrolysed in the water suspension, while aliphatic nitriles do not react.
	p. 127-131 Lajos Kovács Article: Unexpected Thorpe Reaction of an α-Alkoxynitrile Molecules 2000, 5(2), 127-131; doi:10.3390/50200127 Received: 19 January 2000 / Accepted: 14 February 2000 / Published: 17 February 2000 Show/Hide Abstract | Download PDF Full-text (26 KB) Abstract: α-Alkoxynitrile 1 in the presence of tris(methylthio)methyllithium 2 at –78ºC gave the dimer 5 instead of the expected C1-elongated product 3. The formation of compound 5 is explained in terms of anion formation and self-condensation, a variant of the Thorpe reaction. Scrutinizing the 1H NMR spectra revealed that the enamine tautomer 5b is predominant over the imine 5a in the solvents investigated.
	p. 132-152 Pedro Merino, Sonia Anoro, Francisco L. Merchan and Tomas Tejero Article: 1,3-Dipolar Cycloadditions of N-Benzyl Furfuryl Nitrones with Electron-rich Alkenes Molecules 2000, 5(2), 132-152; doi:10.3390/50200132 Received: 25 January 2000 / Accepted: 14 February 2000 / Published: 18 February 2000 Show/Hide Abstract | Download PDF Full-text (369 KB) Abstract: The 1,3-dipolar cycloaddition reaction of N-benzyl-C-(2-furyl)nitrones with electron-rich alkenes gives preferentially trans-substituted 3,5-disubstituted isoxazolidines (endo approach). These experimental results are in good qualitative agreement with the predicted ones by semiempirical (AM1 and PM3) and ab initio (HF/3-21G) methods.
	p. 153-161 Stefaan M. O. Van Dyck, Guy L. F. Lemière, Tim H. M. Jonckers and Roger Dommisse Article: Synthesis of 4-O-Methylcedrusin. Selective Protection of Catechols with Diphenyl Carbonate Molecules 2000, 5(2), 153-161; doi:10.3390/50200153 Received: 1 November 1999 / Accepted: 19 January 2000 / Published: 18 February 2000 Show/Hide Abstract | Download PDF Full-text (51 KB) Abstract: 4-O-Methylcedrusin, a minor component in ‘sangre de drago’, has been synthesized using a strategy of successive protection and deprotection reactions under very mild conditions. The key step of this synthesis is a selective protection of a catechol group as a cyclic carbonate in the presence of an isolated phenol group.
	p. 162-166 Margaret A. Brimble and Letecia J. Duncalf Article: Diels-Alder Cycloaddition of Cyclopentadiene to a Bis-naphthoquinone Molecules 2000, 5(2), 162-166; doi:10.3390/50200162 Received: 21 January 2000 / Accepted: 14 February 2000 / Published: 19 February 2000 Show/Hide Abstract | Download PDF Full-text (34 KB) Abstract: Addition of cyclopentadiene to bis-naphthoquinone (1) afforded predominantly the endo-endo [4+2] cycloadduct (2).
	p. 167-178 Margita Lacova, Renata Gasparova, Dusan Loos, Tibor Liptay and Nada Pronayova Article: Effect of Microwave Irradiation on the Condensation of 6-Substituted 3-Formylchromones with Some Five-membered Heterocyclic Compounds Molecules 2000, 5(2), 167-178; doi:10.3390/50200167 Received: 14 October 1999 / Published: 19 February 2000 Show/Hide Abstract | Download PDF Full-text (76 KB) Abstract: Different types of 3-substituted 4H-4-oxobenzopyrans were prepared by microwave irradiation as well as by a classical method. The beneficial effect of microwave irradiation on the aldol condensation of 3-formylchromones with 2-imino-1-methylimidazolidine-4-one (creatinine), 2-thioxoimidazolidine-4-one (thiohydantoin) and 2-ethyl-2-thioxothiazolidin-4-one (3-ethylrhodanine) in different reaction media is described. Our results show that the effect of microwave irradiation on the reactions studied was a shortening of the reaction times and a smooth increase in the yields. The subsequent reactions of the product with some nucleophiles are discussed. The structure of the products was proven by elemental analysis, IR and NMR spectra.
	p. 179-188 Mario Smet, David Corens, Luc Van Meervelt and Wim Dehaen Article: Synthesis of the Formal Diels-Alder Adducts of N-substituted Dehydromaleimides and Anthracene Molecules 2000, 5(2), 179-188; doi:10.3390/50200179 Received: 12 January 2000 / Accepted: 14 February 2000 / Published: 21 February 2000 Show/Hide Abstract | Download PDF Full-text (72 KB) Abstract: A new class of roof-shaped dibenzobarrelenemaleimide derivatives was prepared by the condensation of a bridged maleic anhydride with amines. A para-substituted bifunctional derivative was proven to be a 1:2 complex with acetone by an X-ray crystallographic study.
	p. 189-194 Pavel Pazdera, Hana Divišová, Helena Havlišová and Petr Borek Article: Synthesis of N-(2-Cyanophenyl)chloromethanimidoyl Chloride Molecules 2000, 5(2), 189-194; doi:10.3390/50200189 Received: 9 December 1999 / Accepted: 5 January 2000 / Published: 24 February 2000 Show/Hide Abstract | Download PDF Full-text (36 KB) Abstract: N-(2-Cyanophenyl)chloromethanimidoyl chloride (3) was prepared from 2-isothiocyanatobenzonitrile by the reaction with sulfuryl chloride or gaseous chlorine in an inert solvent. It was found that N-(2-cyanophenyl)chloromethanimidothioic chloride (2) and bis[N-(cyanophenyl)chloromethanimidoyl] sulfide (7) are intermediates of this reaction. The chloride 3 was obtained also by a three-component one-pot reaction of N-(2-cyanophenyl)-formamide in the present of thionyl chloride and sulfuryl chloride. (2-Cyanophenyl)-(1-{[(2-cyanophenyl)-imino]methoxy}methylidene)ammonium chloride (6) was detected as a by-product of this reaction. Identity of all reaction products was confirmed by GC-MS, FTIR, 1H and 13C NMR spectroscopy.
	p. 195-197 Shu-Kun Lin Book Review: Templated Organic Synthesis. Edited by F. Diederich (diederich@org.chem.ethz.ch) and Peter J. Stang (stang@chemistry.chem.utah.edu). Wiley-VCH: Weinheim. 1999. XX+411 pp. 268 DM. ISBN 3-527-29666-2 Molecules 2000, 5(2), 195-197; doi:10.3390/50200195 Received: 29 December 1999 / Published: 25 February 2000 Show/Hide Abstract | Download PDF Full-text (12 KB) Abstract: n/a
	p. 198-199 Shu-Kun Lin Book Review: Combinatorial Chemistry. Synthesis, Analysis, Screening. Edited by Günther Jung (guenther.jung@uni-tuebingen.de). Wiley-VCH: Weinheim. 1999. XXXII+602 pp. 268 DM. ISBN 3-527-29869-X Molecules 2000, 5(2), 198-199; doi:10.3390/50200198 Received: 29 December 1999 / Published: 23 February 2000 Show/Hide Abstract | Download PDF Full-text (8 KB) Abstract: n/a
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