close

Вход

Забыли?

вход по аккаунту

?

код для вставки
2001
ring opening reactions
ring opening reactions
O 0132
Synthesis of 1,4-Diazidobuta-1,3-dienes by Electrocyclic Ring
16 - 062 Opening: Precursors for Bi-2H-azirin-2-yls and Their Valence Isomerization to Diazabenzenes.
— Diazidobutadienes of type (II) and
(XIV) are generated by ring opening of diazidocyclobutenes, which are formed
either in situ from the corresponding dihalogenides like (I) and (VI) or isolated
and then thermolyzed or photolyzed. Diazide (II) undergoes rearrangement to
very unstable biaziridinyl (V). The formation of pyridazines also proceeds via
such biaziridinyls as is established by NMR data. The use of diazidobutadienes
as building blocks for cycloadditions is demonstrated with the synthesis of
cycloadducts like (XX). — (BANERT, KLAUS; KOEHLER, FRANK; Angew.
Chem., Int. Ed. 40 (2001) 1, 174-177; Lehrstuhl Org. Chem., TU ChemnitzZwickau, D-09111 Chemnitz, Germany; EN)
1
Документ
Категория
Без категории
Просмотров
0
Размер файла
36 Кб
Теги
1/--страниц
Пожаловаться на содержимое документа