close

Вход

Забыли?

вход по аккаунту

?

код для вставки
2005
Imidazole derivatives
R 0190
An Exception of Eschweiler-Clarke Methylation: Cyclocondensation of α-Amino
Amides with Formaldehyde and Formic Acid. — If α-amino amides are treated
09- 105 with
formaldehyde and formic acid under Eschweiler-Clarke conditions in most cases
the N-methylation product is not formed but cyclocondensation with formation of
imidazolidinones of type (III) is observed. Only if all three substituents R1—R3 are
bulky such as in (Ib) the N-methylation product (IVb) is also formed. — (CHEN,
F.-L.; SUNG*, K.; J. Heterocycl. Chem. 41 (2004) 5, 697-700; Dep. Chem., Natl.
Cheng Kung Univ., Tainan 70101, Taiwan; Eng.) — M. Bohle
Документ
Категория
Без категории
Просмотров
0
Размер файла
17 Кб
Теги
1/--страниц
Пожаловаться на содержимое документа