Organoselenium Chemistry: Modern Developments in Organic by Thomas Wirth (auth.), Dr. Thomas Wirth (eds.)

By Thomas Wirth (auth.), Dr. Thomas Wirth (eds.)

Embarking on a brand new millennium, the booklet in fingers describes the hot advancements of organsoselenium chemistry in all elements. numerous special scientists have contributed, with their ability and services, making this ebook a necessary resource for artificial orientated natural chemists and for these, who are looking to get a primary perception into the chemistry of selenium.

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By Thomas Wirth (auth.), Dr. Thomas Wirth (eds.)

Embarking on a brand new millennium, the booklet in fingers describes the hot advancements of organsoselenium chemistry in all elements. numerous special scientists have contributed, with their ability and services, making this ebook a necessary resource for artificial orientated natural chemists and for these, who are looking to get a primary perception into the chemistry of selenium.

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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.

These were isolated in about 30% yield. Scheme 44. Catalytic Asymmetric Methoxyselenenylation-Elimination Reactions of b-Methyl- styrene Electrophilic Selenium, Selenocyclizations 51 Scheme 45. Asymmetric Oxyselenenylation-Elimination Reactions of b,g-Unsaturated Esters and Nitriles Those described above are the first experiments in the field of the selenium catalyzed asymmetric syntheses. The results obtained from these new reactions are encouraging and justify further researches in order to develop more stereoselective and efficient reagents and reaction conditions.

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