Rhodium-Catalyzed Cyclopropanation of Fluorinated Olefins: A Straightforward Route to Highly Functionalized Fluorocyclopropanes
作者:Amandine Pons、Hélène Beucher、Pavel Ivashkin、Gérald Lemonnier、Thomas Poisson、André B. Charette、Philippe Jubault、Xavier Pannecoucke
DOI:10.1021/acs.orglett.5b00576
日期:2015.4.3
An efficient access to highlyfunctionalized monofluorocyclopropanes is described. The developed methodology allowed straightforward access to a large panel of polysubstituted fluorinated cyclopropanes in good to excellent yields and good diastereoselectivities. The Rh-catalyzed cyclopropanation proved to be efficient on several fluorinated olefins and several diazo compounds. This method represents
Synthesis and studies on the mGluR agonist activity of FAP4 stereoisomers
作者:Pavel Ivashkin、Gérald Lemonnier、Amélie S. Tora、Jean-Philippe Pin、Cyril Goudet、Philippe Jubault、Xavier Pannecoucke
DOI:10.1016/j.bmcl.2015.04.043
日期:2015.6
yclopropane-1-carboxylic acid (FAP4) were synthesized via diastereoselective Rh(II)-catalysed cyclopropanation of a phosphonylated fluoroalkene. Different isomers of FAP4 and the corresponding non-fluorinated analogs showed a similar pharmacological profile against the isoforms of metabotropicglutamatereceptor (mGluR). Within the fluorinated series, (−)-(Z)-FAP4 and (−)-(E)-FAP4 demonstrated the
Catalytic Enantioselective Synthesis of Highly Functionalized Difluoromethylated Cyclopropanes
作者:Maxence Bos、Wei-Sheng Huang、Thomas Poisson、Xavier Pannecoucke、André B. Charette、Philippe Jubault
DOI:10.1002/anie.201707375
日期:2017.10.16
The first catalyticasymmetricsynthesis of highly functionalized difluoromethylated cyclopropanes is described. The method, based on a rhodium‐catalyzed cyclopropanation of difluoromethylated olefins, gives access to a broad range of cyclopropanes bearing ester, ketone, or nitro functional groups. By using Rh2((S)‐BTPCP)4 as a catalyst, the corresponding products were obtained in high yields and high
Use of achiral additives to increase the stereoselectivity in Rh(ii)-catalyzed cyclopropanations
作者:David Marcoux、Vincent N. G. Lindsay、André B. Charette
DOI:10.1039/b920587j
日期:——
We describe our studies on the effect of various Lewis bases and Brønsted acids as achiral additives on the stereoselectivity of some Rh(II)-catalyzed cyclopropanations.
Catalytic Asymmetric Syntheses of Alkylidenecyclopropanes from Allenoates with Donor‐Acceptor and Diacceptor Diazo Reagents
作者:Yoko Hasegawa、Thomas Cantin、Jonathan Decaens、Samuel Couve‐Bonnaire、André B. Charette、Thomas Poisson、Philippe Jubault
DOI:10.1002/chem.202201438
日期:2022.8.22
Chiral ACPs: The catalytic asymmetric synthesis of alkylidenecyclopropanes from electron-deficient allenes is described. The methodology, using donor-acceptor or diacceptor diazo reagents, catalyzed by a chiral rhodium complex furnished the corresponding ACPs in high yields with excellent diastereo- and enantioselectivities.