Organoselenium Chemistry I: Functional Group Transformations - download pdf or read online

By Professor Dr. Alain Krief, Professor Dr. László Hevesi (auth.)

ISBN-10: 3642732410

ISBN-13: 9783642732416

ISBN-10: 3642732437

ISBN-13: 9783642732430

During the final fifteen years organoselenium chemistry underwent a dazzling mutation: from an unique region of technological know-how practised by way of a couple of experts it turned a comparatively good mastered and everyday technique of artificial natural chemistry. the main to this good fortune is reasonable variety of selenium dependent reagents and reactions were stumbled on, that are capable of practice particular differences selectively and sometimes lower than very light stipulations. the purpose of this quantity is to provide the several selenium containing reagents now on hand to chemists, to say the scope in addition to the constraints in their reactions, and to check these which own comparable reactivities. The authors current the reagents within the order of accelerating oxidation point round the selenium atom.

Show description

Read Online or Download Organoselenium Chemistry I: Functional Group Transformations PDF

Best chemistry books

Biogeochemistry of Marine Systems (Sheffield Biological - download pdf or read online

Marine platforms range of their sensitivities to perturbation. Perturbation will be insidious - corresponding to expanding eutrophication of coastal components - or it can be dramatic - corresponding to a reaction to an oil spill or another coincidence. weather switch may perhaps ensue incrementally or it can be abrupt, and environment resilience could be a posh functionality of the interactions of the standards and species mediating key biogeochemical methods.

New PDF release: Biophysical Chemistry of Fractal Structures and Processes in

This publication goals to supply the clinical neighborhood with a unique and necessary process in line with fractal geometry suggestions at the vital homes and approaches of various environmental platforms. the translation of complicated environmental structures utilizing smooth fractal ways is in comparison and contrasted with the extra classical techniques.

Download e-book for kindle: Chemistry of Heterocyclic Compounds: Pyridine Metal by

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?

Additional info for Organoselenium Chemistry I: Functional Group Transformations

Example text

PhSeSiM~ CH2CI 2 or THF o (PhCH1 CH1h Te = 0 US'Ph 92% 2eq. PhSeSiM~ .. 2 Hydrogen Selenide, Selenols, Selenocyanates, ... and Related Compounds Me3SiSeSiMe3 RzX=O R=Ph X=Se 96% R=Ph X=Te 89% R=Bu X=Se 62% o I" ~ " RzX THF/20°C/ Ih rS'M. 5 Reduction of Nitro-, Nitroso-, Hydroxylamino-, Azo- and Hydrazo-aromatic Compounds to Aromatic Amines and Reduction of Aryldiazonium Salts to Hydrazinium Salts Hydrogen selenide reduces nitrobenzene to aniline quantitatively [156] (Scheme 42a). Similar results are observed when nitrobenzene, or other title compounds are reacted with carbon monoxide, water and triethylamine in the presence of catalytic amounts of selenium [156] (Scheme 42) (see also Sect.

S!. 0' ~ en lg ()Q I ~ a. 2 Hydrogen Selenide, Selenols, Selenocyanates, ... MeOH R -Nonyl ~ R Se 58 0 C,18h 100% R = (CH2hC02Me 58°C,18h .. 5h Ph ~ 100% [144] KSeCNlMeOH 25°C,16h o 0 o 0 X X 64% [145] KSeCN MeOHireflux 30% [163] Scheme 30 trifluoroacetic acid is monitored [147] by IH NMR (Scheme 32). These reactions have been successfully applied to the synthesis of terminal [145, 147, 169] and a, fJ-disubstitutedolefins [144,146,147,169] includingstilbenes [144,146,147,167, 169], cyclohexenes [144, 146, 164, 169] (Schemes 30, 31) and unsatured sugars [145] (Scheme 30, Entry d) from the corresponding epoxides.

Compounds bearing quaternary centres are also aromatized by selenium at around 340°C by loss of one of the two groups (Schemes 63a, b, d, 64) [197, 199-201,210]. With this respect ethyl groups seem to be more prone to removal than methyl groups (Scheme 64) [202]. Angular alkyl groups present in polycyclic derivatives are also lost and this occurs preferentially with respect to the cleavage of one of the rings (Schemes 63d, 65b, c) [204, 208, 209]. Again an angular ethyl group is more prone to removal than a methyl group.

Download PDF sample

Organoselenium Chemistry I: Functional Group Transformations by Professor Dr. Alain Krief, Professor Dr. László Hevesi (auth.)


by Thomas
4.2

Rated 4.46 of 5 – based on 50 votes