reaction of aldehydes or ketones through a domino process involving two ensuing steps in a single pot is realized. The compatibility of Matsubara's reagent and Wilkinson's complex give a combination that allows, under dihydrogen, the transformation of a carbonyl function into a methyl group. This new method is suitable to introduce an ethyl motif from aromatic and aliphatic aldehydes with total chemoselectivity
proceed via ferrocenylmethylcarbene, and afford similar reaction products. In these reactions, a preferred addition reaction of the carbene to vinylferrocene is noticed. In this connection, the competitive reactivities of vinylferrocene, styrene, p-methoxystyrene and cyclohexene towards dichlorocarbene and diphenylcarbene have been measured.
Simple reduction of ferrocenyl aldehydes and ketones by sodium boranuide in trifluoroacetic acid: new, efficient, general preparation of alkylferrocenes
作者:Sukanta Bhattacharyya
DOI:10.1039/p19960001381
日期:——
Alkylferrocenes are obtained in excellent yields by ionic hydrogenation of ferrocenyl aldehydes and ketones using sodium boranuide and trifluoroacetic acid.
Mild and efficient rhodium-catalyzed deoxygenation of ketones to alkanes
作者:Gilles Argouarch
DOI:10.1039/c9nj02954k
日期:——
A new and simple method for the deoxygenation of ketones to alkanes is presented. Most substrates are reduced under mild conditions by triethylsilane in the presence of catalytic amounts of [Rh(μ-Cl)(CO)2]2. This system selectively provides the methylene hydrocarbons in good to excellent yields starting from acetophenones and diaryl ketones. A rapid examination of the reaction pathway suggests that
This paper focuses on the synthesis of the novel ferrocene-appended porphyrin architectures and their zinc metal complexes. Tetraferrocenylporphyrins are a class of organometallic compounds where the porphyrin core is functionalized with a ferrocenyl unit at each of the four meso positions. Tetraferrocenylporphyrin derivatives were synthesized via a direct tetramerization reaction between some ferrocene
本文重点研究新型二茂铁附加卟啉结构及其锌金属配合物的合成。四二茂铁基卟啉是一类有机金属化合物,其中卟啉核在四个内消旋位中的每一个都被二茂铁基单元官能化。在BF 3 ·Et 2 O作为高效催化剂存在下,部分二茂铁甲醛衍生物与吡咯直接四聚反应合成了四茂铁卟啉衍生物。此外,四二茂铁卟啉衍生物与醋酸锌之间的金属化反应被应用于相关锌配合物的合成。新的有机金属化合物的结构通过傅里叶变换红外光谱(FT-IR)确认,1 H NMR、13 C NMR、UV-vis 和 CHNS 分析。合成化合物的氧化还原活性特性通过循环伏安法 (CV) 分析表征。