PREFERENTIAL FORMATION OF 5-MEMBERED RINGS IN 2 CLAISEN CYCLIZATIONS

被引：0
|
作者：
BRANDANGE, S
LEIJONMARCK, H
NOVACIC, Z
机构：
来源：
JOURNAL OF THE CHEMICAL SOCIETY-CHEMICAL COMMUNICATIONS | 1992年 / 07期
关键词：
D O I：
10.1039/c39920000569
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Alpha-Lithiations of the acetoxy groups of 1 and 2 lead to Claisen cyclisations in which five-membered rings are formed much faster than six-membered rings; this selectivity is opposite to that of aldol condensations.
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页码：569 / 570
页数：2
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