4.8 Article

Lithium diisopropylamide-mediated enolizations: Solvent-independent rates. solvent-dependent mechanisms

期刊

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
卷 122, 期 11, 页码 2452-2458

出版社

AMER CHEMICAL SOC
DOI: 10.1021/ja992062z

关键词

-

向作者/读者索取更多资源

Rate studies of a lithium diisopropylamide-mediated ester enolization reveal solvation effects that are not in accord with expectation. Metalations in THF, t-BuOMe, HMPA/THF, and DMPU/THF (HMPA = hexamethylphosphoramide, DMPU = 1,3-dimethyl-3,4,5,6-tetrahydro-2(1H)-pyrimidone) occur at nearly the same rates, yet proceed via four fundamentally distinct scenarios: (1) disolvated monomer in THF, (2) monosolvated dimer in t-BuOMe, (3) both monosolvated monomer and tetrasolvated dimer in HMPA/THF, and (4) mono- and disolvated monomers in DMPU/THF. The implication of reactive open dimers in t-BuOMe and triple ions in HMPA/THF underscores the importance of aggregate-based reactions.

作者

我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。

评论

主要评分

4.8
评分不足

次要评分

新颖性
-
重要性
-
科学严谨性
-
评价这篇论文

推荐

暂无数据
暂无数据