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Химия Химия
Физическая химия Физическая химия


Regio- and Stereoselective Catalytic Addition of Amides to Alkynes. Synthesis of the enamide substructure in the most atom-economic and environmentally friendly way

Автор:   Mathieu B.
мягкая обложка
228 страниц
2009 год
Издательство:   Книга по Требованию
3984 руб
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Описание:Based on previous work on the addition of secondary amides to alkynes, a new broadly applicable protocol for the catalytic addition of N-nucleophiles such as primary amides, imides and thioamides to terminal alkynes was developed. Traditional syntheses of this important substrate class involve rather harsh reaction conditions such as high temperatures and/or the use of strong bases. The enamide moiety is an important substructure often encountered in biologically active compounds and synthetic drugs. The choice of ligands and additives determines the regiochemical outcome so that with two complementary catalyst systems, both the E-anti-Markovnikov products and the Z-anti-Markovnikov products can be synthesized highly regio- and stereoselectively. Furthermore, enamides and their derivatives are versatile synthetic intermediates for polymerization, [4+2] cycloaddition, crosscoupling, Heck-olefinination, Halogenation, enantioselective addition or asymmetric hydrogenation.

Orthomol Immun Junior Сила иммунитета на страже Вашего ребенка Orthomol Immun Junior Сила иммунитета на страже Вашего ребенка

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Сборник упражнений по грамматике английского языка

It could be smashed by violence but never forced to fulfil. (Stone)17. Never before had the friar had such power and never had his voice rung out with such a clap of doom. (Stone) Exercise 29. Analyse the following sentences. 1. His heart felt swollen in his chest. (Stone) 2. The girl [Aileen] was really, beautiful and much above the average intelligence and force. (Dreiser)3. Footsore and downhearted, they were making their way back to Coolgardie doing a bit of prospecting. (Prichard)4. The idleness made him cranky. (Stone)5. The prior's hearty, warm-cheeked face went dark at the mention of Savanarola's name. (Stone)6. Ah, to be a soldier, Michelangelo, to fight in mortal combat, to kill the enemy with sword and lance, conquer new lands and all their women? That is the life! (Stone) 7. He said it in a very mature, man-to-man tone. (Warren)8. Evidently George and the sheriff were getting along in a very friendly way, for all the former's bitter troubles and lack of means. (Dreiser)9. Together they sketched the apostles, the one bald-headed, the other supporting the weeping John. (Stone)10 ...»

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