Synthesis of Difluorinated Halohydrins by the Chemoselective Addition of Difluoroenolates to α-Haloketones
作者:Munia F. Sowaileh、Maali D. Alshammari、David A. Colby
DOI:10.1021/acs.orglett.1c01636
日期:2021.7.2
α-Haloketones are valuable intermediates in the synthesis of pharmaceuticals and natural products because they display two electrophiles. Although chemoselective additions to each of these functional groups are known, the use of fluorinated nucleophiles has not been characterized, except for the dimerization of fluorohalomethyl ketones. Our studies demonstrate the use of difluoroenolates to create
Magnesium-Promoted Additions of Difluoroenolates to Unactivated Imines
作者:Alex L. Nguyen、Hari R. Khatri、James R. Woods、Cassidy S. Baldwin、Frank R. Fronczek、David A. Colby
DOI:10.1021/acs.joc.7b03014
日期:2018.3.16
produce fluorinated and trifluoromethylated organic structures, the construction of difluoromethylated compounds remains a synthetic challenge. We have discovered that unactivated imines will react with difluoroenolates under exceedingly mild conditions when using magnesium salts and organic bases. We have applied this approach to the iminoaldol reaction to produce difluoromethylene groups as α,α-dif
COMPOSITIONS AND PROCESSES OF PREPARING AND USING THE SAME
申请人:Colby David A.
公开号:US20140039182A1
公开(公告)日:2014-02-06
The present invention relates to compositions, for example, the DBU/Hexafluoroacetone hydrate salt, and processes of preparing and using the same for the modification of chemical compounds via the release of trifluoroacetate. The DBU/Hexafluoroacetone hydrate salt can perform trifluoromethylation reactions on chemical compounds, such as carbonyl group-containing compounds.