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ch$
ch$
Laatste Update: 2011-10-23
Gebruiksfrequentie: 1
Kwaliteit:
grup fiiller g -- > gu
grupiverbid g -- > gu
Laatste Update: 2011-10-23
Gebruiksfrequentie: 1
Kwaliteit:
Waarschuwing: Bevat onzichtbare HTML-opmaak
ch' ongjincity in korea
ch' ongjincity in korea
Laatste Update: 2011-10-23
Gebruiksfrequentie: 1
Kwaliteit:
İsviçre almancası (de- ch)
Šveitsi saksa (de- ch)
Laatste Update: 2011-10-23
Gebruiksfrequentie: 1
Kwaliteit:
catamarca (ct), chubut (ch)
catamarca (ct), chubut (ch)
Laatste Update: 2011-10-23
Gebruiksfrequentie: 1
Kwaliteit:
bilim sürüm 0. 26. 5 yazarı rene beutler (1998) rbeutler@ g26. ethz. ch
teadus versioon 0. 26. 5 kirjutanud rene beutler (1998) rbeutler@ g26. ethz. ch
Laatste Update: 2011-10-23
Gebruiksfrequentie: 1
Kwaliteit:
bu derleme, antimikrobiyal aktiviteleri için sentezlenen ve değerlendirilen çeşitli hidrazonların yapılarının ayrıntılı bir çalışmasını içerir. hidrazon, r1r2c = nnh2 yapısına sahip bir organik bileşikler sınıfıdır. yeni ilaç geliştirme için önemli bir bileşik sınıfına yol açan bir azometin nhn = ch protonu içeren hidrazonlar. hidrazonlar, çeşitli biyolojik ve klinik uygulamaları nedeniyle çok önemli kullanımı olan biyoaktif heterosiklik bileşiklerin çoğunda mevcuttur. bu nedenle
the need to design new compounds to deal with the resistant strains has become one of the most important areas of research today. hydrazone is a versatile moiety that exhibits a wide variety of biological activities. a hydrazone is a class of organic compounds with the structure r1r2c=nnh2. hydrazones are basically related to ketones and aldehydes. hydrazones are formed by the replacement of the oxygen of carbonyl compounds with the -nnh2 functional group. hydrazones act as reactants in many important reactions e.g. hydrazone iodination, shapiro reaction and bamford-stevens reaction to form vinyl compounds. also a hydrazone act as an intermediate in wolff–kishner reduction. hydrazone can also be synthesized by the japp– klingemann reaction (from β-keto-acids or β-keto-esters and aryl diazonium salts). n,n'-dialkyl type of hydrazones can be hydrolysed, reduced and oxidised, this leads to formation of amines by reduction of n-n bond. the carbon atom of the c=n bond can react with organometallic nucleophiles. the alpha-hydrogen atom of hydrazones is more nucleophilic as compared to ketones because alpha-hydrogen atom of hydrazones is 10 times more acidic than ketones
Laatste Update: 2021-02-08
Gebruiksfrequentie: 1
Kwaliteit:
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