Functionalization of 3‐Iodo‐
<i>N</i>
,
<i>N</i>
‐Diisopropylferrocene‐Carboxamide, a Pivotal Substrate to Open the Chemical Space to 1,3‐Disubstituted Ferrocenes
acrylates, and substituted styrenes with 2-iodo-N,N-diisopropylferrocencarboxamide. Furthermore, the developed three-component Catellani method proceeded with the retention of the configuration of the planar chiral ferrocene, which depends on the role of the participating carbon–iodine bond in ferrocene. Consequently, the developed protocol enabled the formation of densely substituted chiral 2-aryl
Synthesis of planar chiral ferrocenyl 1,3-diamines and 1,3-amino ethers
作者:James C. Anderson、Alexander J. Blake、Jennifer C. Arnall-Culliford
DOI:10.1039/b307014j
日期:——
The efficient syntheses of novel planarchiral 1,3-diamines and 1,3-amino ethers with an oxy or amino function directly bound to the cyclopentadienyl ring of ferrocene has been developed. The key reaction is the Cu2O promoted substitution of (pR)-N,N-diisopropyl-2-iodoferrocenecarboxamide with either phthalimide or AcOH to introduce nitrogen or oxygen functionality onto the cyclopentadienyl ring. The
KO<sup><i>t</i></sup>Bu-Mediated Synthesis of Dimethylisoindolin-1-ones and Dimethyl-5-phenylisoindolin-1-ones: Selective C–C Coupling of an Unreactive Tertiary sp<sup>3</sup> C–H Bond
dihalobenzamides for the synthesis of biaryl 5-phenylisoindolin-1-ones. It seems that the reaction proceeds via a radical pathway in which the aryl radical translocates via 1,5-hydrogen atom transfer (HAT), forming a tertiary alkyl carbon-centered radical. The generated tertiary alkyl radical could attack the benzamide ring in a 5-exo/endo-trig manner followed by the release of an electron and a proton, leading to
由2-卤代-N-异丙基-N-烷基苯甲酰胺底物和KO t Bu通过不反应的叔sp 3 C-H键的选择性CC偶联,提出了一种合成二甲基异吲哚啉酮的新反应。该反应对伯或秒的sp 3 C–H叔键表现出优异的选择性碳氢键。此外,使用二卤代苯甲酰胺合成联芳基5-苯基异吲哚-1-酮可以在一锅中实现联芳基CC偶联和烷基芳基CC偶联。看来反应是通过自由基途径进行的,其中芳基通过1,5-氢原子转移(HAT)转移,形成以叔烷基碳为中心的自由基。产生的叔烷基可以5-外/内触发方式攻击苯甲酰胺环,随后释放电子和质子,从而形成五元异吲哚啉酮环。HAT似乎负责叔烷基在伯和仲CH键上的选择性官能化。
On the
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‐Arylation of Acetamide Using 2‐, 3‐ and 1’‐Substituted Iodoferrocenes**
作者:Lingaswamy Kadari、William Erb、Yury S. Halauko、Oleg A. Ivashkevich、Vadim E. Matulis、Dmitry Lyakhov、Thierry Roisnel、Palakodety Radha Krishna、Florence Mongin
DOI:10.1002/ejic.202000904
日期:2021.1.26
range of original 1,2‐, 1,3‐ and 1,1’‐disubstituted ferrocenes to be obtained. The results were compared as a function of the substituent and its position on the ring. DFT calculations revealed higher activation barrier for the oxidative addition in the ferrocene series when compared with classical planar aromatics. Structure‐property relationships were applied to rationalize the reactivity of the different