Download e-book for iPad: Advances in Asymmetric Synthesis, Volume 3, Volume 3 by Alfred Hassner

By Alfred Hassner

ISBN-10: 0080551998

ISBN-13: 9780080551999

ISBN-10: 0762301066

ISBN-13: 9780762301065

Enantioselective man made equipment usually are not simply within the leading edge of chemical and pharmaceutical examine yet job during this quarter is continually expanding. it's encouraged by way of the urgency to acquire medicinal drugs or compounds of medicinal curiosity as unmarried anantiomers, and the keeness to synthesize traditional items in nonracemic shape. This quantity provides seven chapters from pioneers and experts during this speedily increasing box.

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Extra info for Advances in Asymmetric Synthesis, Volume 3, Volume 3 (Advances in Asymmetric Synthesis)

Sample text

The transition state resulting from the unlike approach ("ul") does not have this interaction. We also observed that compound 25a was very stable and did not epimerize to the endo isomer upon treatment with bases or acids. ^^ Initially, the experiments with chiral lithium amides did not look very promising. A number of chiral lithium amides were tested in the aldol reaction and the Me J 25a (exo-lhreo) TS ^ ^ Figure 6. Diastereoselective formation of only one diasteroisomer of the tropinone aldol.

71 IV. Summary and Conclusions 74 Acknowledgments 74 References 74 Advances in Asymmetric Synthesis Volume 3, pages 39-76. Copyright e 1998 by JAI Press Inc. Allrightsof reproduction in any form reserved. ISBN: 0-7623-0106-6 39 40 MAREK MAJEWSKI I. INTRODUCTION Perhaps no other area of organic chemistry has experienced as rapid growth during the last two decades as asymmetric synthesis. In 1971, Morrison and Mosher summarized the state of knowledge in the area in one volume of ca. 450 pages. ^ Following the flow of ideas in this rapidly expanding field is a difficult task which could be facilitated by adopting a systematic approach to conceptual developments.

Synthesis 1980, 234. This Page Intentionally Left Blank ENANTIOSELECTIVE DEPROTONATION OF CYCLIC KETONES Marek Majewski I. Introduction 40 11. Deprotonation of Ketones 42 A. Fundamentals 42 B. Enantioselective Deprotonation: A New Concept 44 C. Refinement of Enantioselective Deprotonation Methodology 46 III. Applications 62 A. Synthesis of Tropane Alkaloids 62 B. Synthesis of Terpenoids via Enantioselective Deprotonation 69 C. Polyoxygenated Natural Products: Synthesis of Carbohydrate Derivatives .

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Advances in Asymmetric Synthesis, Volume 3, Volume 3 (Advances in Asymmetric Synthesis) by Alfred Hassner


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