Fortschritte der Chemie organischer Naturstoffe / Progress in the Chemistry of Organic Natural Products, Vol. 93 (eBook)

Mahendra Sahai, Edda Gössinger, Marta Luzhetska, Johannes Härle, Sajeli A. Begum, Anil B. Ray (Autoren)

A. Douglas Kinghorn, Heinz Falk, Junichi Kobayashi (Herausgeber)

eBook Download: PDF

2010 | 2010
XVI, 264 Seiten
Springer Wien (Verlag)
978-3-7091-0140-7 (ISBN)

Infos

Lignans, by convention, are a group of natural products that are formed by linking two phenylpropanoid units (C C units) by oxidative coupling. Most importantly, in 6 3 a lignan, two (C C units) are bound through the central carbon of their side chains, 6 3 0 i. e. the 8 and 8 positions (1, 2). The occurrence of C C -dimers, linked at sites other 6 3 0 than the 8-8 positions, is also known and these compounds have been termed neolignans (3, 4). As these two groups of compounds have close structural as well as biosynthetic relationships, they are often associated together and incorporated under the general term 'lignan' (5). The diverse structural categorization of true lignans and of a few neolignans is presented in Fig. 1. Through the years, several review articles or books covering different facets of lignans, including their ch- istry (6, 7), biogenesis (8), synthesis (9), and biological activities (10) have been published. Enduring research for the investigation of secondary metabolites of plants has evidenced some compounds that are biogenetically related to true lignans or neolignans but bear some features not discerned in conventional lignans. These compounds or groups of compounds have been termed as 'non-conventional lignans', and include coumarinolignans, ?avonolignans, and stilbenolignans. The non-conventional lignans, like the conventional ones, have two C C units linked 6 3 together but have additional structural features to place them also under the category of coumarins, ?avonoids, or stilbenes.

Inhalt

List of Contributors
Nonconventional Lignans: Coumarinolignans, Flavonolignans, and Stilbenolignans
by Sajeli A. Begum, Mahendra Sahai, and Anil B. Ray
1. Introduction
2. Coumarinolignans
3. Flavonolignans
4. Stilbenolignans
References
Picrotoxanes
by Edda Gössinger
1. Introduction
2. Tabular Overview of the Picrotoxanes
3. Occurrence
4. Isolation of Picrotoxanes
5. Structure Determination of Picrotoxanes
6. Total Syntheses of Picrotoxanes
7. Biosynthesis of Picrotoxanes
8. Physiological Activity of Picrotoxanes
Abbreviations
References
Combinatorial and Synthetic Biosynthesis in Actinomycetes
by Marta Luzhetska, Johannes Härle, and Andreas Bechthold
1. Introduction
2. Combinatorial Biosynthesis and Synthetic Biosynthesis
References
Author Index
Subject Index

Produkt-Details

• Erscheint lt. Verlag: 17.6.2010
• Reihe/Serie: Fortschritte der Chemie organischer Naturstoffe Progress in the Chemistry of Organic Natural Products
• Reihe/Serie: Fortschritte der Chemie organischer Naturstoffe Progress in the Chemistry of Organic Natural Products
• Zusatzinfo: XVI, 264 p. 40 illus., 7 illus. in color.
• Verlagsort: Vienna
• Sprache: englisch
• Themenwelt: Naturwissenschaften ► Chemie ► Organische Chemie
• Themenwelt: Technik
• Schlagworte: biochemistry • Chemistry • natural product • Polymer • synthesis
• ISBN-10: 3-7091-0140-9 / 3709101409
• ISBN-13: 978-3-7091-0140-7 / 9783709101407