close

Вход

Забыли?

вход по аккаунту

?

код для вставки
2005
Thiophene derivatives
R 0090
Improved Studies of Cross-Coupling Reactions of 5-(Tri-n-butylstannyl)- and
with Aryl Halides. — The palladium07- 095 5,5'-Bis(tri-n-butylstannyl)-2,2'-bithiophene
-catalyzed Stille coupling of bithiophenes with aryl halides for carbon-carbon formation is investigated. Aryl iodides are more reactive than their bromide analogues, and
changing the aryl halides from bromo to iodo is accompanied by a substantial improvement in yields. Products (III) and (VI) are contaminated with organotin halides as
byproducts, which can be transformed into insoluble organotin fluorides and separated.
A possible mechanism for the coupling reactions is described. — (ELGAZWY, A.-S.
S. H.; J. Heterocycl. Chem. 41 (2004) 5, 755-759; Dep. Chem., Fac. Sci., Ain-Shams
Univ., Cairo, Egypt; Eng.) — H. Hoennerscheid
Документ
Категория
Без категории
Просмотров
0
Размер файла
20 Кб
Теги
1/--страниц
Пожаловаться на содержимое документа