close

Вход

Забыли?

вход по аккаунту

?

код для вставки
2005
Benzopyran derivatives
R 0350
Enantioselective Enol Lactone Synthesis under Double Catalytic Conditions. —
first example of a highly enantioselective enol lactone synthesis is demonstrated
32- 137 The
with the reaction of a variety of nucleophile precursors, under double-catalytic conditions. The loading of a catalytic system consisting of (R,R)-DBFOX-Ph/nickel-(II) perchlorate hydrate and TMP can be minimized to 2 mol% and the highest enantioselectivity attained is 99% e.e. The key steps of the reaction are Michael addition followed
by cyclization with removal of the pyrazole auxiliary. — (ITOH, K.; HASEGAWA,
M.; TANAKA, J.; KANEMASA*, S.; Org. Lett. 7 (2005) 6, 979-981; Inst. Mater.
Chem. Eng., Kyushu Univ., Kasuga 816, Japan; Eng.) — R. Steudel
2005
Документ
Категория
Без категории
Просмотров
0
Размер файла
44 Кб
Теги
1/--страниц
Пожаловаться на содержимое документа