نتایج جستجو برای: thiophenes

تعداد نتایج: 426  

2017
Wenjie Shao Sherif J. Kaldas Andrei K. Yudin

We report the preparation of hitherto unprecedented 3-cyanoallyl boronates using condensation of the parent a-boryl aldehyde and nitriles. The resulting allyl boronates have been used to generate a wide range of borylated thiophenes, which represent a valuable class of heterocycles in modern drug discovery. Subsequent Suzuki–Miyaura cross-coupling enabled the synthesis of pharmaceutically impor...

Journal: :The Journal of organic chemistry 2012
Serge I Gorelsky David Lapointe Keith Fagnou

A comprehensive understanding of the C-H bond cleavage step by the concerted metalation-deprotonation (CMD) pathway is important in further development of cross-coupling reactions using different catalysts. Distortion-interaction analysis of the C-H bond cleavage over a wide range of (hetero)aromatics has been performed in an attempt to quantify the various contributions to the CMD transition s...

A Ghaemi H Soleimanjahi M Farsbaf Mogahddam MVM Pourbaig R Omidbaigi

A large number of plants have been used by various societies for the treatment of disease. Tagetes minuta L. (Asteraceae) is an annual species native of South American, although it has became widespread throughout the world. It is used in medicinal tea and condiments. Decoction of the plant is used as beverage and as a remedy for common cold, digestive system complaints, stomach upsets, diarrhe...

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