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| Ultima descărcare din IBN: 2023-11-13 20:51 |
 SM ISO690:2012BARBĂ, Nicanor, DRAGALINA, Galina, POPUŞOI, Ana. CCercetarea unor căi de sinteză a
izotiocianatochalconelor
. In: Studia Universitatis Moldaviae (Seria Ştiinţe Reale şi ale Naturii), 2008, nr. 7(17), pp. 154-158. ISSN 1814-3237. |
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| Studia Universitatis Moldaviae (Seria Ştiinţe Reale şi ale Naturii) | ||||||
| Numărul 7(17) / 2008 / ISSN 1814-3237 /ISSNe 1857-498X | ||||||
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| Pag. 154-158 | ||||||
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Different methodes of izothiocyanatochalcones′ synthesis were studied. Good results give the method which includes condensation of N,N-dimethylthioureidoacetophenones with aromatic aldehydes, followed by elimination of dimethylamine from the corresponding chalcone when it is being treated with acetic anhydride in the case of 4-dimethylamino-3′ and 4′-N,N-dimethylthioureidochalcones. Direct condensation of 4-dimethylaminobenzaldehyde with 4-izothiocyanatoacetophenone in the presence of acid catalyst gives a chalcone yield of 91%. |
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