Read e-book online Topics in current chemistry, 208, Organoselenium Chemistry: PDF

By Thomas Wirth, T. Wirth H. Kessler (Editor), K.N. Houk (Editor), J.-M. Lehn (Editor)

ISBN-10: 3540665161

ISBN-13: 9783540665168

Show description

Read Online or Download Topics in current chemistry, 208, Organoselenium Chemistry: Modern Developments in Organic Synthesis PDF

Best chemistry books

Read e-book online Biogeochemistry of Marine Systems (Sheffield Biological PDF

Marine structures range of their sensitivities to perturbation. Perturbation might be insidious - equivalent to expanding eutrophication of coastal parts - or it can be dramatic - akin to a reaction to an oil spill or another twist of fate. weather switch may well happen incrementally or it can be abrupt, and atmosphere resilience might be a fancy functionality of the interactions of the standards and species mediating key biogeochemical techniques.

Read e-book online Biophysical Chemistry of Fractal Structures and Processes in PDF

This publication goals to supply the medical neighborhood with a singular and helpful procedure in accordance with fractal geometry thoughts at the very important houses and methods of numerous environmental structures. the translation of complicated environmental platforms utilizing sleek fractal techniques is in comparison and contrasted with the extra classical techniques.

Read e-book online Chemistry of Heterocyclic Compounds: Pyridine Metal PDF

Content material: bankruptcy 1 necessities of Coordination Chemistry (pages 1–12): bankruptcy 2 ? ?Pyridine Coordination Compounds with Nontransition Metals (pages 13–185): bankruptcy three ? ?Pyridine Coordination Compounds with Transition Metals (pages 186–2067): bankruptcy four Coordination Compounds of Metals With Pyridine 1?

Extra resources for Topics in current chemistry, 208, Organoselenium Chemistry: Modern Developments in Organic Synthesis

Sample text

Metodologie ed Applicazioni”) and CNR, Rome, is gratefully acknowledged. I thank all collaborators whose names appear in the references for their stimulating enthusiasm and involvement. The technical assistence of Dr. C. Santi in preparing the manuscript is particularly appreciated. 6 References 1. Nicolaou KC, Petasis NA (1984) Selenium in Natural Products Synthesis, CIS, Philadelphia, p 207 2. Paulmier C (1986) Selenium Reagents and Intermediates in Organic Synthesis, Pergamon, Oxford 3. Liotta D (1987) Organoselenium Chemistry, Wiley, New York 4.

78 1 Introduction The chemistry of nucleophilic selenium reagents began in 1973 when Sharpless et al. reported a simple method to prepare a benzeneselenolate equivalent 1 and its usefulness in the nucleophilic ring opening of various epoxides [1]. The subsequent oxidative elimination of the phenylseleno group led to allylic alcohols under mild conditions (Scheme 1). Sodium borohydride (NaBH4) was employed as a reducing reagent to generate 1 from diphenyl diselenide (PhSeSePh) in ethanol.

Unless one of the few commercially available selenenylating agents is employed, the first step consists of the preparation of the appropriate reagent. Next, the reaction with an unsaturated compound, in the presence of an external or an internal nucleophile, affords the addition product which in most cases is not the final product but an intermediate which must be isolated and purified. Often the molecule is subjected to further manipulations that are favored by the presence of the selenium functionality.

Download PDF sample

Topics in current chemistry, 208, Organoselenium Chemistry: Modern Developments in Organic Synthesis by Thomas Wirth, T. Wirth H. Kessler (Editor), K.N. Houk (Editor), J.-M. Lehn (Editor)


by Paul
4.0

Rated 4.51 of 5 – based on 25 votes