CACHE Level 2 Extended Diploma in Health & Social Care, Rasheed Elizabeth
Автор: Rasheed Muhammad Название: Tales of Sinanju ISBN: 0991526627 ISBN-13(EAN): 9780991526628 Издательство: Неизвестно Рейтинг: Цена: 1471.00 р. Наличие на складе: Есть у поставщика Поставка под заказ.
Автор: Na`allah, Abdul-rasheed (kwara State University, Nigeria) Название: Yoruba oral tradition in islamic nigeria ISBN: 0367260328 ISBN-13(EAN): 9780367260323 Издательство: Taylor&Francis Рейтинг: Цена: 7961.00 р. Наличие на складе: Есть у поставщика Поставка под заказ.
Описание: This book traces Dadakuada`s history and artistic vision and discusses its vibrancy as the most popular traditional Yoruba oral art form in Islamic Africa. This book will be of interest to scholars of traditional African culture, African art history, performance studies and Islam in Africa,
Описание: Dianions and masked dianions represent important building blocks for the regioselective formation of carbon-carbon bonds. Cyclocondensation reactions of 1,3-bis(silyl enol ethers) with different mono(silyl enol ethers) provide an elegant approach for the synthesis of various complex carba- and heterocycles from simple starting materials. A variety of functionalized and sterically encumbered triarylmethanes were prepared by combination of FeCl3-catalyzed benzylations of 1,3-diketones and formal [3+3] cyclocondensation reactions of 1,3-bis(silyl enol ethers) and 3-benzyl-1-silyloxy-1-en-3-ones. Subsequently, 4-methoxy-, 4-chloro and 4-flulro-substituted triarylmethanes are prepared The products are not readily available by other methods. In addition, functionalized diarylmethanes have been also prepared by cyclocondensation of 1.3-bis(silyl enol ethers) with with respective 3-benzyl-1-silyloxy-1-en-3-ones. Further more, dianions were converted to useful cyclic structure of pyranones with functionalized benzaldehydes providing a new strategy. Varius pyranones were synthecized containing 3-bromo-, 4-Methyl-, 4Phenyl-, 4-methoxy- and 4-hydoxy-phenyle groups.
