Synthesis of trifluoromethyl-/cyclopropyl-substituted 2-isoxazolines by DBU-promoted domino reaction
作者:Xiao-Dong Liu、Hai-Yan Ma、Chun-Hui Xing、Long Lu
DOI:10.1016/j.cclet.2017.03.031
日期:2017.8
cyclopropyl substituted 2-isoxazolines were synthesized via a DBU-promoted domino reaction of β-trifluoromethyl-/β-cyclopropyl-substituted enones with hydroxylamine. The domino reaction consists of a Michael addition and the followed cyclization. A wide range of 3-substituted 5-cyclopropyl-5- trifluoromethyl-2-isoxazolines were obtained in good to excellent yields under mild reaction conditions. The method
Alkynylation of cyclopropyl trifluoromethyl ketone catalyzed by CuF 2 ·2H 2 O/4,7-diphenyl-1,10-phenanthroline
作者:Xiao-Dong Liu、Hai-Yan Ma、Chun-Hui Xing、Long Lu
DOI:10.1016/j.tetlet.2017.03.010
日期:2017.4
CuF2·2H2O/4,7-diphenyl-1,10-phenanthroline was found to be a highly efficient catalyst for the nucleophilic alkynylation of cyclopropyl trifluoromethyl ketone. The corresponding trifluoromethyl-substituted tertiary propargyl alcohols were synthesized in moderate to excellent yields under mild conditions. The catalyst system could also be applied to aromatic trifluoromethyl ketone as well as trifluoropyruvate
发现CuF 2 ·2H 2 O / 4,7-二苯基-1,10-菲咯啉是用于环丙基三氟甲基酮的亲核烷基化的高效催化剂。在温和的条件下以中等至优异的产率合成了相应的三氟甲基取代的叔炔丙醇。该催化剂体系也可以应用于芳族三氟甲基酮以及三氟丙酮酸盐。
Cs2CO3-catalyzed alkylation of indoles with trifluoromethyl ketones
作者:Xiao-Dong Liu、Yi Wang、Hai-Yan Ma、Chun-Hui Xing、Yu Yuan、Long Lu
DOI:10.1016/j.tet.2017.03.012
日期:2017.4
A Cs2CO3-catalyzed alkylation reaction of indoles with trifluoromethyl ketones was presented. Both alicyclic and aromatic trifluoromethyl ketones as well as various substituted indoles are compatible with the methodology. Good to excellent yields of the corresponding trifluoromethyl substituted tertiary alcohols 2,2,2-tritrifluoro-1-(1H-indol-3-yl)-ethan-1-ols were acquired as the sole products.
提出了Cs 2 CO 3催化的吲哚与三氟甲基酮的烷基化反应。脂环族和芳族三氟甲基酮以及各种取代的吲哚都与该方法相容。作为唯一产物,获得了相应的三氟甲基取代的叔醇2,2,2-三三氟-1-(1H-吲哚-3-基)-乙烷-1-醇的良好至优异的产率。
Structural Effects on Thermal Rearrangement of Fulleroids to Methanofullerenes. The Prominent Role of Cyclopropyl vs Aryl Substituent
作者:Hiroshi Kitamura、Takumi Oshima
DOI:10.1021/ol702691y
日期:2008.1.1
The kinetics of the thermal rearrangement of a series of novel cyclopropyl-substituted [5,6] open fulleroids to the [6,6] closed methanofullerenes have been investigated in comparison with the aryl-substituted homologues. The cyclopropyl group markedly accelerated the rates due to the stereoelectronically favorable pi-conjugative effects in the radical-like [1,5] shift of the transient [5,6] closed
Trifluoromethanesulfonic acid-catalyzed solvent-free bisindolylation of trifluoromethyl ketones
作者:Yi Wang、Yu Yuan、Chun-Hui Xing、Long Lu
DOI:10.1016/j.tetlet.2013.12.078
日期:2014.1
A trifluoromethanesulfonic acid-catalyzed solvent-free bisindolylation reaction of indoles with alkyl and aryl trifluoromethyl ketones has been developed. The trifluoromethyl-substituted bisindolylalkane derivatives were synthesized in moderate to excellent yields. (C) 2014 Elsevier Ltd. All rights reserved.