在钯络合物催化剂的存在下,三氟甲基取代的肉桂酸碳酸丙二酯的烯丙基亲核取代反应在区域和立体选择性上产生了S N 2'产物。在类似的空间环境中,由三氟甲基的极性作用引起的区域化学与甲基化的肉桂基底物相反。与苯基衍生物相比,在空间上更受阻的异丁烯和叔丁基底物也使产物在受阻更严重的位置反应。尽管检查了预期分子内配位会影响区域化学的邻位取代底物,但未检测到其他区域异构体。
α,β-Unsaturated CF3-ketones via secondary amine salts-catalyzed aldol condensation of 1,1,1-trufluoroacetone with aromatic and heteroaromatic aldehydes
作者:Alexander V. Popov、Valentina A. Kobelevskaya、Nikolai I. Borodin、Sergey V. Zinchenko
DOI:10.1016/j.jfluchem.2023.110108
日期:2023.4
A facile and efficient approach to the synthesis of α,β-unsaturated CF3-ketones in moderate to excellent yields via the amine salt-catalyzed aldol condensation of aromatic and heteroaromatic aldehydes with trifluoroacetone has been developed.
Gazit, Aviv; Rappoport, Zvi, Journal of the Chemical Society. Perkin transactions I, 1984, # 12, p. 2863 - 2870
作者:Gazit, Aviv、Rappoport, Zvi
DOI:——
日期:——
A New α-Seleno- or Nonselenoperfluoroacyl Olefination of Aldehydes and Ketones Using β-Ethoxy-β-perfluoroalkyl Vinylic Selenides
作者:Yoshiaki Matsubara、Mitsuhiro Yoshimatsu
DOI:10.1021/jo0003246
日期:2000.7.1
The polar effect on the regiochemistry of nucleophilic substitution of trifluoromethylated π-allylpalladium complex
作者:T Okano
DOI:10.1016/s0022-328x(03)00262-6
日期:2003.6.16
Allylic nucleophilic substitution of trifluoromethyl-group substituted cinnamyl carbonate with diethyl malonate anion in the presence of palladium complex catalyst gave regio- and stereoselectively the SN2′ product. The regiochemistry caused by the polar effect of trifluoromethyl group was opposite to the methylated cinnamyl substrate in a similar steric environment. The sterically more hindered mesityl
在钯络合物催化剂的存在下,三氟甲基取代的肉桂酸碳酸丙二酯的烯丙基亲核取代反应在区域和立体选择性上产生了S N 2'产物。在类似的空间环境中,由三氟甲基的极性作用引起的区域化学与甲基化的肉桂基底物相反。与苯基衍生物相比,在空间上更受阻的异丁烯和叔丁基底物也使产物在受阻更严重的位置反应。尽管检查了预期分子内配位会影响区域化学的邻位取代底物,但未检测到其他区域异构体。