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Molecules, Volume 3, Issue 2 (February 1998) – 10 articles , Pages 31-50, Articles M46-M48

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Open AccessBook Review
NMR of Polymers. By F. A. Bovey Frank Bovey
Molecules 1998, 3(2), 50; https://doi.org/10.3390/30200050 - 28 Feb 1998
Viewed by 3115
Abstract
This comprehensive book on all aspects of modern NMR techniques as applied to synthetic polymers (not natural) is divided into five chapters.[...] Full article
Open AccessBook Review
Classics in Total Synthesis. By K.C. Nicolaou and E. J. Sorensen
Molecules 1998, 3(2), 49; https://doi.org/10.3390/30200049 - 28 Feb 1998
Viewed by 6047
Abstract
This book is essential for any synthetic organic chemist.[...] Full article
Open AccessBook Review
Polymer Syntheses, Vol. 3, 2nd Edition. By Stanley R. Sandler
Molecules 1998, 3(2), 48; https://doi.org/10.3390/30200048 - 28 Feb 1998
Viewed by 2892
Abstract
This is the latest volume in the Polymer Syntheses series which sets out to describe the most current methods of preparing olefin-sulfur dioxide copolymers, polythioesters, sulfide polymers, polyisocyanates, polyoxyalkylhydroxy compounds, polyvinylcarbazoles, polyvinyl acetates, polyally esters and polyvinyl fluorides.[...] Full article
Open AccessShort Note
(+)-8-Hydroxy-labdan-17-oic Acid
Molecules 1998, 3(2), M48; https://doi.org/10.3390/M48 - 18 Feb 1998
Cited by 3 | Viewed by 1780
Abstract
Hanson [1,2] reported a compound with [a]D = -7° and identical IR and NMR spectral data to our compound.[...] Full article
(This article belongs to the Section Molbank Section of Molecules, 1997-2001)
Open AccessShort Note
Ethyl-(R,S)-5-acetyl-4,5-dihydro-3-isoxazole Acetate
Molecules 1998, 3(2), M47; https://doi.org/10.3390/M47 - 18 Feb 1998
Viewed by 2677
Abstract
The isoxazoline 3 was prepared by the [3+2] cycloaddition of the nitroderivative 1 [1] with methyl vinyl ketone 2 under Mukaiyama conditions [2].[...] Full article
(This article belongs to the Section Molbank Section of Molecules, 1997-2001)
Open AccessShort Note
1-Methyl-3-nitro-5-methoxycarbonyl Pyrazole
Molecules 1998, 3(2), M46; https://doi.org/10.3390/M46 - 18 Feb 1998
Cited by 1 | Viewed by 2555
Abstract
The nitroester 2 was prepared by the addition of meta-chloro-perbenzoic acid (m-CPBA) to 1 [1] according to the reported procedure [2,3].[...] Full article
(This article belongs to the Section Molbank Section of Molecules, 1997-2001)
Open AccessArticle
A Short and Efficient Synthesis of (R)-Phoracantholide I
Molecules 1998, 3(2), 44-47; https://doi.org/10.3390/30200044 - 13 Feb 1998
Cited by 3 | Viewed by 5166
Abstract
A short and efficient chemoenzymatic synthesis of the title compound has been developed. The salient features of the synthesis were i) preparation of the required chiron via a porcine pancreatic lipase (PPL) catalyzed esterification of a ω-functionalized 2-alkanol and ii) use of easily [...] Read more.
A short and efficient chemoenzymatic synthesis of the title compound has been developed. The salient features of the synthesis were i) preparation of the required chiron via a porcine pancreatic lipase (PPL) catalyzed esterification of a ω-functionalized 2-alkanol and ii) use of easily accessible and inexpensive materials/ reagents. Full article
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Open AccessCommunication
A Three Step Synthesis of 11-Cycloheptylundecanoic Acid, a Component of the Thermoacidophile Alicyclobacillus cycloheptanicus
Molecules 1998, 3(2), 41-43; https://doi.org/10.3390/30200041 - 13 Feb 1998
Cited by 1 | Viewed by 4502
Abstract
A simple synthesis of the methyl ester of 11-cycloheptylundecanoic acid (1), isolated from the lipid fraction of the thermoacidofile, Alicyclobacillus cycloheptanicus has been developed. This involved regioselective Grignard coupling between cycloheptylmagnesium bromide and methyl 11-bromoundecanoate (2), prepared from 10- undecanoic acid. Full article
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Open AccessArticle
An Expedient Synthesis of the Sugarcane Borer Pheromone Components
Molecules 1998, 3(2), 35-40; https://doi.org/10.3390/30200035 - 13 Feb 1998
Cited by 6 | Viewed by 5213
Abstract
A practical synthesis of the title compounds has been developed. The salient features of the synthesis were i) use of easily accessible starting materials viz. aleuritic acid, 10-undecenoic acid, cyclohexanone etc. and ii) fixation of the required olefinic geometry via Wittig [...] Read more.
A practical synthesis of the title compounds has been developed. The salient features of the synthesis were i) use of easily accessible starting materials viz. aleuritic acid, 10-undecenoic acid, cyclohexanone etc. and ii) fixation of the required olefinic geometry via Wittig and acetylenic routes. Full article
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Open AccessArticle
An Improved Synthesis of Homocitrate
Molecules 1998, 3(2), 31-34; https://doi.org/10.3390/30200031 - 13 Feb 1998
Cited by 12 | Viewed by 5534
Abstract
Monoethyl malonate (1) and tert-butyl alcohol are esterified by catalysis with dicyclohexylcarbodiimide and 4-dimethylaminopyridine to yield ethyl t-butyl malonate (2). The ethoxymagnesio derivative (3) of the ester is condensed with b-carbomethoxypropionyl chloride to give the triester (4), which is decomposed by heating under [...] Read more.
Monoethyl malonate (1) and tert-butyl alcohol are esterified by catalysis with dicyclohexylcarbodiimide and 4-dimethylaminopyridine to yield ethyl t-butyl malonate (2). The ethoxymagnesio derivative (3) of the ester is condensed with b-carbomethoxypropionyl chloride to give the triester (4), which is decomposed by heating under vacuum in the presence of b-naphthalensulfonic acid to give ethyl methyl β-ketoadipate (5). Compound 5 is reacted with hydrogen cyanide,followed by hydrolysis of the cyanohydrin to give the free acid (6). Compound 6 is converted to homocitrate (7) by the use of an improved procedure. Full article
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