这篇完整的报告介绍了两种不同羰基物质的氧化分子间偶联的背景、发现和广泛的见解。该过程的优化最终形成了使用可溶性铜 (II) 或铁 (III) 盐作为氧化剂将酰胺、酰亚胺、酮和羟吲哚结合的可靠且可扩展的方案。广泛的机理研究表明,在铜 (II) 的情况下是金属螯合的单电子转移过程,而基于铁 (III) 的偶联似乎是通过非模板化的异二聚化进行的。这项工作提供了迄今为止对氧化烯醇偶联机制最深入的发现。氧化烯醇杂偶联的范围很广(40 个例子),并且已被证明即使在大规模(克级或更大)上也是有效的。最后,
[EN] NICOTINAMIDE DERIVATIVES USEFUL AS PDE4 INHIBITORS<br/>[FR] DERIVES DE NICOTINAMIDE UTILES COMME INHIBITEURS DE PDE4
申请人:PFIZER LTD
公开号:WO2003068235A1
公开(公告)日:2003-08-21
The invention relates to nicotinamide derivatives of formula (1) and to processes for the preparation of, intermediates used in the preparation of, compositions containing and the uses of, such derivatives. The nicotinamide derivatives according to the present invention are phosphodiesterase-4 inhibitors and are useful in numerous diseases, disorders and ( conditions, in particular inflammatory, allergic, respiratory diseases, disorders and conditions, as well as wounds.
Intermolecular Enolate Heterocoupling: Scope, Mechanism, and Application
作者:Michael P. DeMartino、Ke Chen、Phil S. Baran
DOI:10.1021/ja804159y
日期:2008.8.27
while iron(III)-based couplings appear to proceed through a non-templated heterodimerization. This work presents the most in-depth findings on the mechanism of oxidativeenolate coupling to date. The scope of oxidativeenolateheterocoupling is extensive (40 examples) and has been shown to be efficient even on a large scale (gram-scale or greater). Finally, the method has been applied to the total synthesis
这篇完整的报告介绍了两种不同羰基物质的氧化分子间偶联的背景、发现和广泛的见解。该过程的优化最终形成了使用可溶性铜 (II) 或铁 (III) 盐作为氧化剂将酰胺、酰亚胺、酮和羟吲哚结合的可靠且可扩展的方案。广泛的机理研究表明,在铜 (II) 的情况下是金属螯合的单电子转移过程,而基于铁 (III) 的偶联似乎是通过非模板化的异二聚化进行的。这项工作提供了迄今为止对氧化烯醇偶联机制最深入的发现。氧化烯醇杂偶联的范围很广(40 个例子),并且已被证明即使在大规模(克级或更大)上也是有效的。最后,
Generation of α-alkoxycarbonyl alkylidenecarbenes: Synthesis of t-butyl cyclopentenecarboxylates
Triflates of 2-hydroxymethytene t-butyl esters, derived from simple t-butyl esters, were treated with potassium t-butoxide in THF to generate alkylidenecarbenes. At room temperature, they underwent intramolecular 1,5 C-H insertion giving t-butyl cyclopentenecarboxylates.