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Eine grosse Anzahl heterocyclischer Naturstoffe leitet sich vom Ring- system des Piperidins (1) ab. Als Substituenten einfach oder mehrfach substituierter Piperidinbasen finden sich Methyl-, Carboxyl-, Hydroxyl- und Aminogruppen sowie aliphatische Seitenketten unterschiedlicher Lange. Die Substitution erfolgt bevorzugt an den C-Atomen 2, 3 und 6 sowie am Heteroatom. In zahlreichen Fallen ist der Piperidinring in a- oder ss-Stellung direkt oder uber eine C-Brucke mit einem weiteren Heterocyclus verbunden, z. B. einem Piperidin-, Piperidein-, Pyridin-, Indol-, Chinolizidin- oder Furanrest. Daruber hinaus kann der Piperidin- ring zum 2,6-Dioxopiperidin (Glutarimid) oxydiert oder zum Pipendein dehydriert sein. Wahrend Naturstoffe mit Pyridinstruktur im Tier- und Pflanzenreich weit verbreitet sind und einzelnen von ihnen wie NAD oder Pyridoxal- phosphat als Coenzymen des Primarstoffwechsels besondere Bedeutung zukommt, handelt es sich bei den naturlichen Piperidinverbindungen im allgemeinen um sekundare Pflanzenstoffe (vgl. I8, I9I). Dabei sind einige wie z. B. die Pipecolinsaure (7) sporadisch auf verschiedene Pflanzen- familien verteilt. Andere Piperidinbasen wie die Conium- oder Piper- Alkaloide weisen dagegen eine ausgesprochene Artspezifitat auf. Im Gegensatz zu den meisten Pyridinalkaloiden finden sich die Piperidin- basen oft mit strukturell andersartig gebauten Alkaloiden vom Chino- lizidin- oder Trepantyp vergesellschaftet, was in den meisten Fallen durch eine enge biogenetische Verwandtschaft bedingt sein durfte.
Eine grosse Anzahl heterocyclischer Naturstoffe leitet sich vom Ring- system des Piperidins (1) ab. Als Substituenten einfach oder mehrfach substituierter Piperidinbasen finden sich Methyl-, Carboxyl-, Hydroxyl- und Aminogruppen sowie aliphatische Seitenketten unterschiedlicher Lange. Die Substitution erfolgt bevorzugt an den C-Atomen 2, 3 und 6 sowie am Heteroatom. In zahlreichen Fallen ist der Piperidinring in a- oder ss-Stellung direkt oder uber eine C-Brucke mit einem weiteren Heterocyclus verbunden, z. B. einem Piperidin-, Piperidein-, Pyridin-, Indol-, Chinolizidin- oder Furanrest. Daruber hinaus kann der Piperidin- ring zum 2,6-Dioxopiperidin (Glutarimid) oxydiert oder zum Pipendein dehydriert sein. Wahrend Naturstoffe mit Pyridinstruktur im Tier- und Pflanzenreich weit verbreitet sind und einzelnen von ihnen wie NAD oder Pyridoxal- phosphat als Coenzymen des Primarstoffwechsels besondere Bedeutung zukommt, handelt es sich bei den naturlichen Piperidinverbindungen im allgemeinen um sekundare Pflanzenstoffe (vgl. I8, I9I). Dabei sind einige wie z. B. die Pipecolinsaure (7) sporadisch auf verschiedene Pflanzen- familien verteilt. Andere Piperidinbasen wie die Conium- oder Piper- Alkaloide weisen dagegen eine ausgesprochene Artspezifitat auf. Im Gegensatz zu den meisten Pyridinalkaloiden finden sich die Piperidin- basen oft mit strukturell andersartig gebauten Alkaloiden vom Chino- lizidin- oder Trepantyp vergesellschaftet, was in den meisten Fallen durch eine enge biogenetische Verwandtschaft bedingt sein durfte.
This is a reproduction of a book published before 1923. This book may have occasional imperfections such as missing or blurred pages, poor pictures, errant marks, etc. that were either part of the original artifact, or were introduced by the scanning process. We believe this work is culturally important, and despite the imperfections, have elected to bring it back into print as part of our continuing commitment to the preservation of printed works worldwide. We appreciate your understanding of the imperfections in the preservation process, and hope you enjoy this valuable book. ++++ The below data was compiled from various identification fields in the bibliographic record of this title. This data is provided as an additional tool in helping to ensure edition identification: ++++ The Grecian History D. GOLDSMITH J.Robinson, 1800
The past two decades have seen an explosion in research on the
synthesis of sesquiterpenes, an important class of hydrocarbons
commonly found in oils, resins, and balsams. Volume Eleven in The
Total Synthesis of Natural Products series continues to review this
dynamic area of chemistry. It features systematic, A-to-Z coverage
of sesquiterpenes synthesized between 1979-1994-a sesquidecade.
The indispensable reference for the twenty-first century chemist... A fascinating and comprehensive look into one of chemistry's fastest growing specialties--sesquiterpene synthesis--Volume Ten of The Total Synthesis of Natural Products focuses on acyclic and monocyclic compounds and sheds light on the structure and makeup of this important class of hydrocarbons. A useful and practical tool for researchers interested in locating any of the major classes of sesquiterpene compounds, the author will also provide, if needed, a database to the more than 1,600 articles on sesquiterpene synthesis. The ultimate index to the newest experimental work in synthetic chemistry, this latest volume in The Total Synthesis of Natural Products series is also a glossary to the new language of chemistry in the next century. Look for the following related title in the series: THE TOTAL SYNTHESIS OF NATURAL PRODUCTS, Volume Eleven Volume Eleven continues the authoritative coverage on sesquiterpene synthesis begun in Volume Ten, examining compounds with bicyclic and tricyclic ring structures., 1997 (0-471-18874-3) The research on the synthesis of sesquiterpenes, derivatives of terpenes, a class of hydrocarbons commonly found in oils, resins, and balsams, has grown exponentially over the past fifteen years. With over 500 sesquiterpene syntheses already developed, the literature on this experimental specialty is voluminous, now encompassing over 1,600 re-search papers. Volume Ten in The Total Synthesis of Natural Products provides a systematic and comprehensive look at acyclic and monocyclic compounds in sesquiterpene synthesis. Reflecting one of the significant changes in sesquiterpene re-search, that is, the increase in compound targets prepared in an optically active form, the present volume includes their absolute configurations, signs of optical rotation, or both. This newest volume in The Total Synthesis of Natural Products series is an "A-to-Z" look at acyclic and monocyclic compounds in sesquiterpene synthesis, one of the most dynamic areas in the ongoing revolution in chemical synthesis, and is a must for the chemical professional.
The indispensable reference for the twenty-first century chemist... A fascinating and comprehensive look into one of chemistry's fastest growing specialties--sesquiterpene synthesis--Volume Ten of The Total Synthesis of Natural Products focuses on acyclic and monocyclic compounds and sheds light on the structure and makeup of this important class of hydrocarbons. A useful and practical tool for researchers interested in locating any of the major classes of sesquiterpene compounds, the author will also provide, if needed, a database to the more than 1,600 articles on sesquiterpene synthesis. The ultimate index to the newest experimental work in synthetic chemistry, this latest volume in The Total Synthesis of Natural Products series is also a glossary to the new language of chemistry in the next century. Look for the following related title in the series: THE TOTAL SYNTHESIS OF NATURAL PRODUCTS, Volume Eleven Volume Eleven continues the authoritative coverage on sesquiterpene synthesis begun in Volume Ten, examining compounds with bicyclic and tricyclic ring structures., 1997 (0-471-18874-3) The research on the synthesis of sesquiterpenes, derivatives of terpenes, a class of hydrocarbons commonly found in oils, resins, and balsams, has grown exponentially over the past fifteen years. With over 500 sesquiterpene syntheses already developed, the literature on this experimental specialty is voluminous, now encompassing over 1,600 re-search papers. Volume Ten in The Total Synthesis of Natural Products provides a systematic and comprehensive look at acyclic and monocyclic compounds in sesquiterpene synthesis. Reflecting one of the significant changes in sesquiterpenere-search, that is, the increase in compound targets prepared in an optically active form, the present volume includes their absolute configurations, signs of optical rotation, or both. This newest volume in The Total Synthesis of Natural Products series is an "A-to-Z" look at acyclic and monocyclic compounds in sesquiterpene synthesis, one of the most dynamic areas in the ongoing revolution in chemical synthesis, and is a must for the chemical professional.
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