close

Вход

Забыли?

вход по аккаунту

?

код для вставки
2004
Ring closure reactions
O 0130
Pd(II)-Catalyzed Cyclogeneration of Carbocations: Subsequent Rearrangement
Trapping under Oxidative Conditions. — Under optimized conditions, various
50- 031 and
1,5-dienes bearing phenol, alkene, alcohol or sulfonamide moieties undergo under
optimized conditions oxidative polycyclizations to give polycyclic alkenes. Except for
(II), only mixtures of double bond isomers are formed. Their direct hydrogenation
affords polycyclic products in good yields and with excellent diastereoselectivities. In
the case of carbinol (XIII), a ring-expanding/contracting pinacol rearrangement of the
putative intermediary carbocation leads to the bicyclic product (XII). — (KOH, J. H.;
MASCARENHAS, C.; GAGNE*, M. R.; Tetrahedron 60 (2004) 34, 7405-7410; Dep.
Chem., Univ. N. C., Chapel Hill, NC 27599, USA; Eng.) — Klein
2004
Документ
Категория
Без категории
Просмотров
0
Размер файла
34 Кб
Теги
1/--страниц
Пожаловаться на содержимое документа