Blue LED Irradiation of Iodonium Ylides Gives Diradical Intermediates for Efficient Metal‐free Cyclopropanation with Alkenes
作者:Tristan Chidley、Islam Jameel、Shafa Rizwan、Philippe A. Peixoto、Laurent Pouységu、Stéphane Quideau、W. Scott Hopkins、Graham K. Murphy
DOI:10.1002/anie.201908994
日期:2019.11.18
A facile and highly chemoselective synthesis of doubly activated cyclopropanes is reported where mixtures of alkenes and β-dicarbonyl-derived iodoniumylides are irradiated with light from blue LEDs. This metal-free synthesis gives cyclopropanes in yields up to 96 %, is operative with cyclic and acyclic ylides, and proceeds with a variety of electronically-diverse alkenes. Computational analysis explains
the relative reactivities (k OH /k add ) being 0.3-0.5. In marked contrast, the «carboxylate» carbene generated from the sodium salt of the diazoacetate under the same conditions produces mostly the OH insertion product at the expense of the cyclopropanes, k OH /k add being >100. The marked effect of the carboxylate group is nicely explained in terms of the participation by the neighboring carboxylate
[EN] CYCLOPROPYLAMINE DERIVATIVES USEFUL AS INHIBITORS OF HISTONE DEMETHYLASES KDM1A<br/>[FR] DÉRIVÉS DE CYCLOPROPYLAMINE UTILES EN TANT QU'INHIBITEURS DE HISTONE DÉMÉTHYLASES KDM1A
申请人:ISTITUTO EUROP DI ONCOLOGIA S R L
公开号:WO2014086790A1
公开(公告)日:2014-06-12
(I) The present invention relates to cyclopropyl derivatives of general formula (I), wherein A, R1, and R2 are as defined in the specification. The present application also relates to pharmaceutical compositions containing such compounds and to their use in therapy.
CYCLOPROPYLAMINE DERIVATIVES USEFUL AS INHIBITORS OF HISTONE DEMETHYLASES KDM1A
申请人:INSTITUTO EUROPEO DI ONCOLOGIA S.R.L.
公开号:US20150315126A1
公开(公告)日:2015-11-05
The present invention relates to cyclopropyl derivatives of general formula (I), wherein A, R
1
, and R
2
are as defined in the specification. The present application also relates to pharmaceutical compositions containing such compounds and to their use in therapy.
Thermally Induced Cycloadditions of Donor/Acceptor Carbenes
作者:Stephanie R. Ovalles、Jørn H. Hansen、Huw M. L. Davies
DOI:10.1021/ol201628d
日期:2011.8.19
The thermal decomposition of aryldiazoacetates and aryldiazoketones in the absence of a catalyst leads to synthetically useful transformations. The thermal reaction of aryldiazoacetates with alkenes generates cyclopropanes in 68-97% yield and with good diastereoselectivity (up to 19:1 dr) when the aryl substituent is electron-rich. The thermal reaction of aryldiazoketones with alkenes generated cyclobutanones in 71-94% yield and with good diastereocontrol (>= 9:1 dr).