Synthesis of CF<sub>3</sub>–Containing Linear Nitriles from α-(Trifluoromethyl)styrenes
作者:Sixue Xu、Yupian Deng、Jingjing He、Qianding Zeng、Chuan Liu、Yi Zhang、Bin Zhu、Song Cao
DOI:10.1021/acs.orglett.1c01988
日期:2021.8.6
Four unprecedented base-catalyzed/mediated nucleophilic additions of TMSCN to α-(trifluoromethyl)styrenes and 2-trifluoromethyl enynes were developed. The reaction proceeded smoothly at room temperature under mild and transition-metal-free conditions without affecting the trifluoromethyl group and afforded the corresponding CF3-containing alkyl, alkynyl, and butadienyl nitriles in moderate to excellent
Superbase-Mediated <i>gem</i>-Difluoroalkenylations of Sulfoximines
作者:Xianliang Wang、Chenyang Wang、Carsten Bolm
DOI:10.1021/acs.orglett.2c03046
日期:2022.10.14
At ambient temperature, deprotonated sulfoximines react with 1-trifluoromethylalkenes to provide either N- or C-gem-difluoroalkenylated products. The reaction site depends upon the N substituent of the starting material. The optimal conditions involve the use of a superbasic system NaOH in dimethyl sulfoxide. The reactions are characterized by a broad substrate scope and medium to high yields. Scale-up
在环境温度下,去质子化亚砜亚胺与 1-三氟甲基烯烃反应生成 N-或 C-偕二氟烯基化产物。反应位点取决于起始材料的 N 取代基。最佳条件包括在二甲亚砜中使用超碱性系统 NaOH。该反应的特点是底物范围广,产率中高。N-和C- gem-二氟烯基化的放大实验进展顺利。在分子氧下用芳基硫醇处理N-二氟烯丙基亚砜亚胺得到相应的氧化加成产物。
Enantioselective Cobalt-Catalyzed Hydroboration of Fluoroalkyl-Substituted Alkenes to Access Chiral Fluoroalkylboronates
作者:Ming Hu、Boon Beng Tan、Shaozhong Ge
DOI:10.1021/jacs.2c06488
日期:2022.8.24
Selective defluoroborylation and asymmetric hydroboration reactions of fluoroalkyl-substituted terminal alkenes with pinacolborane (HBpin) have been developed with cobalt catalysts generated from Co(acac)2 and bisphosphine ligands. A variety of fluoroalkyl-substituted terminal alkenes undergo this enantioselective hydroboration, affording the corresponding chiral alkylboronates containing fluoroalkyl-substituted
作者:Yue Zhao、Claire Empel、Wenjing Liang、Rene M. Koenigs、Frederic W. Patureau
DOI:10.1021/acs.orglett.2c03419
日期:2022.12.9
The unprecedented photochemical late-stage defluorinative gem-difluoroallylation of arylsulfoniumsalts, which are formed site-selectively by direct C(sp2)─H functionalization, is herein disclosed. This method is distinguished by its mild reaction conditions, wide scope, and excellent site-selectivity. As showcase examples, a Flurbiprofen and Pyriproxyfen derivatives could be late stage C(sp2)─H
Fe-catalyzed hydroxytrifluoromethylation of α-(trifluoromethyl)styrenes with CF<sub>3</sub>SO<sub>2</sub>Na: facile access to α,β-bistrifluoromethyl tertiary alcohols
作者:Pai Zheng、Chuan Liu、Qianding Zeng、Yi Zhang、Ying Liu、Jingjing He、Yupian Deng、Song Cao
DOI:10.1039/d2ob02035a
日期:——
A mild and practical Fe-catalyzed hydroxytrifluoromethylation of α-(trifluoromethyl)styrenes with CF3SO2Na in the presence of K2S2O8 and air was developed. The reaction proceeded efficiently at room temperature without β-fluoride elimination and afforded the corresponding α,β-bistrifluoromethyl tertiary alcohols in good to excellent yields.
在 K 2 S 2 O 8和空气存在下,开发了一种温和且实用的 Fe 催化的 α-(三氟甲基) 苯乙烯与 CF 3 SO 2 Na 的羟基三氟甲基化反应。该反应在室温下有效进行,没有 β-氟化物消除,并以良好至优异的产率提供相应的 α,β-双三氟甲基叔醇。