71778-34-2Relevant academic research and scientific papers
Metal-free domino Cloke-Wilson rearrangement-hydration-dimerization of cyclopropane carbaldehydes: A facile access to oxybis(2-aryltetrahydrofuran) derivatives
Banerjee, Prabal,Dey, Raghunath,Rajput, Shruti
, (2020/03/13)
In this work, we have demonstrated a metal-free transformation of cyclopropane carbaldehydes to oxybis(2-aryltetrahydrofuran) derivatives via a domino Cloke-Wilson rearrangement-hydration-dimerization sequence. Commercially inexpensive p-toluene sulfonic acid (PTSA) was used as a Br?nsted acid catalyst, and reactions were conducted in an open-flask. Detection of reaction intermediates were carried to get an insight into the reaction pathway.
Asymmetric, Nearly Barrierless C(sp3)-H Activation Promoted by Easily-Accessible N-Protected Aminosulfoxides as New Chiral Ligands
Jerhaoui, Soufyan,Djukic, Jean-Pierre,Wencel-Delord, Joanna,Colobert, Fran?oise
, p. 2532 - 2542 (2019/03/07)
Although chiral sulfoxides are important motifs in medicinal chemistry and asymmetric synthesis, design and applications of sulfoxide ligands are still limited, in particular in the context of asymmetric C-H activation. We disclose herein the conception a
Oxidative ring-opening of ferrocenylcyclopropylamines to N-ferrocenylmethyl β-hydroxyamides
Gee, Yi Sing,Goertz, Neils J. M.,Gardiner, Michael G.,Hyland, Christopher J. T.
, p. 2498 - 2503 (2016/03/01)
The in situ reduction of ferrocenyl cyclopropylimines to the corresponding amines triggers a facile oxidative ring-opening to yield the formal four-electron oxidation products: N-ferrocenylmethyl β-hydroxyamides. This process is believed to proceed via generation of a ferrocinium ion in the presence of air, leading to facile formation of a distonic radical cation that is ultimately trapped by oxygen.
One-pot approach for the synthesis of trans-cyclopropyl compounds from aldehydes. Application to the synthesis of GPR40 receptor agonists
Davi, Micha?l,Lebel, Hélène
supporting information; experimental part, p. 4974 - 4976 (2009/06/05)
A novel multicatalytic one-pot process providing trans-cyclopropyl compounds from corresponding aldehydes has been developed and applied to the synthesis of GPR40 small molecule agonists. The Royal Society of Chemistry.
Solvolysis of 1-[trans-2-(m- Orp-Substituted Phenyl)cyclopropyl]- 1-methylethyl p-Nitrobenzoates
Kusuyama, Yoshiaki
, p. 685 - 691 (2007/10/03)
The solvolyses of 1-[trans-2-(m- or p-substituted phenyl)cyclopropyl]-1-methylethyl p-nitrobenzoates in 80% aqueous acetone have been studied with regard to both reactivity and product composition. For the less reactive substituents such as m-Br, m-Cl, and m-CF3, the solvolysis products were the corresponding 2-(2-arylcyclopropyl)-2-propanol, indicating the cyclopropylmethyl cation intermediate. The ring-opened products increased as the electron-donating ability of the substituents increased. The application of the Yukawa-Tsuno equation to the reactivity afforded a ρ value of -1.43 and r value of 0.59 with a correlation coefficient of 0.997. A large value of r indicates the presence of the allylic cation intermediate where much more charge develops at the benzylic carbon for the derivatives with electron-donating substituents than is the case for the cyclopropylmethyl cation intermediate. Thus the solvolysis reaction proceeds via two independent pathways: one has a cyclopropyl cation intermediate and the other has a homoallylic cation intermediate.
ARYLCYCLOPROPANE PHOTOCHEMISTRY. UNUSUAL AROMATIC SUBSTITUENT EFFECTS ON THE PHOTOCHEMICAL REARRANGEMENT OF (2-ARYLCYCLOPROPYL)METHYL ACETATES TO 1-ARYLHOMOALLYL ACETATES.
Hixson,Franke,Gere,Xing
, p. 3601 - 3610 (2007/10/02)
Irradiation of trans(2-arylcyclopropyl)methyl acetates a 4-butenyl-1-arylacetate (7a,b,d-h) via an ionic mechanism from the singlet state. Similar rearrangements occurred with exo-(1,1a,6,6a-tetrahydrocycloprop left bracket a right bracket inden-1-yl)methyl acetate and the 4-cyano derivative. Excited state reaction rate constants were determined from reactant fluorescence lifetimes and product quantum yields. It is concluded that the rate-determining step involves conversion of the initially formed aromatic excited state to a reactive cyclopropane excited state and that cyclopropane to aromatic ring charge transfer enhances this process.
