Differentiation between the ethoxycarbonyl groups in diethyl malate via their titanium-catalyzed reductive cyclopropanation with ethylmagnesium bromide and subsequent site-selective three-carbon ring cleavage
摘要:
Ethoxycarbonyl groups in O-THP protected racemic diethyl malate I were differentiated by their reductive cyclopropanation with ethylmagnesium bromide in the presence of titanium(IV) isopropoxide and subsequent site-selective C1-C2, C2-C3 or both C1-C2 and C1-C3 ring cleavage of the cyclopropyl groups of the resulting bis-cyclopropanol 2. (c) 2005 Elsevier Ltd. All rights reserved.
Differentiation between the ethoxycarbonyl groups in diethyl malate via their titanium-catalyzed reductive cyclopropanation with ethylmagnesium bromide and subsequent site-selective three-carbon ring cleavage
摘要:
Ethoxycarbonyl groups in O-THP protected racemic diethyl malate I were differentiated by their reductive cyclopropanation with ethylmagnesium bromide in the presence of titanium(IV) isopropoxide and subsequent site-selective C1-C2, C2-C3 or both C1-C2 and C1-C3 ring cleavage of the cyclopropyl groups of the resulting bis-cyclopropanol 2. (c) 2005 Elsevier Ltd. All rights reserved.
Simple access to β-trifluoromethyl-substituted ketones via copper-catalyzed ring-opening trifluoromethylation of substituted cyclopropanols
作者:Dzmitry G. Kananovich、Yulia A. Konik、Dzmitry M. Zubrytski、Ivar Järving、Margus Lopp
DOI:10.1039/c5cc02386f
日期:——
A variety of β-trifluoromethyl ketones have been easily prepared by CuCl-catalyzed ring-opening trifluoromethylation of cyclopropanols with Togni reagent.
一种多样的β-三氟甲基酮已经通过CuCl催化的环丙醇与Togni试剂的环开三氟甲基化反应轻松制备。
Preparation of isopropylidene acetals from butane-1,2,4-triol and its cyclopropane congeners
作者:Konstantin N. Prokhorevich、Andrei V. Bekish
DOI:10.1016/j.tetlet.2010.05.126
日期:2010.8
Features of isopropylideneacetal synthesis from butane-1,2,4-triol and its cyclopropane congeners were studied. Procedures for the preparation and purification of the respective acetonides have been developed.
Differentiation between the ethoxycarbonyl groups in diethyl malate via their titanium-catalyzed reductive cyclopropanation with ethylmagnesium bromide and subsequent site-selective three-carbon ring cleavage
作者:Andrei V. Bekish、Oleg G. Kulinkovich
DOI:10.1016/j.tetlet.2005.08.076
日期:2005.10
Ethoxycarbonyl groups in O-THP protected racemic diethyl malate I were differentiated by their reductive cyclopropanation with ethylmagnesium bromide in the presence of titanium(IV) isopropoxide and subsequent site-selective C1-C2, C2-C3 or both C1-C2 and C1-C3 ring cleavage of the cyclopropyl groups of the resulting bis-cyclopropanol 2. (c) 2005 Elsevier Ltd. All rights reserved.