A two-step process for the synthesis of aryl and heteroaryl trifluoromethyl ketones from the corresponding aldehydes is described. Trifluoromethyl alcohols were prepared from aryl and heteroaryl aldehydes in excellent yields using catalytic amount of K2CO3. The trifluoromethyl alcohols were then oxidized conveniently and efficiently by o-iodoxybenzoic acid (IBX) under mild conditions to get the desired
描述了由相应的醛合成芳基和杂芳基三氟甲基酮的两步法。使用催化量的K 2 CO 3由芳基和杂芳基醛以极好的收率制备三氟甲醇。然后在温和的条件下,通过邻碘氧苯甲酸(IBX)方便有效地氧化三氟甲醇,得到所需的官能化芳基和杂芳基三氟甲基酮。
Tuning isoform selectivity and bortezomib sensitivity with a new class of alkenyl indene PDI inhibitor
作者:Reeder M. Robinson、Leticia Reyes、Ravyn M. Duncan、Haiyan Bian、Eric D. Strobel、Sarah L. Hyman、Allen B. Reitz、Nathan G. Dolloff
DOI:10.1016/j.ejmech.2019.111906
日期:2020.1
indene pharmacophore and show a high degree of correlationbetween potency of PDI inhibition and bortezomib (Btz) potentiation in MM cells. Inhibition of PDI leads to ER and oxidative stress characterized by the accumulation of misfolded poly-ubiquitinated proteins and the induction of UPR biomarkers ATF4, CHOP, and Nrf2. This work characterizes the synthesis and SAR of a new chemical class and further
β-(het)aryl-β-fluoroalkyl β-aminoacids and their α-hydroxy derivatives can be readily obtained using a decarboxylative Mannich-type reaction without protection/deprotection steps. This protocol utilizes lithium hexamethyldisilazide and (het)arylfluoroalkyl ketones to generate NH-ketimine intermediates. The mild reaction conditions allow the preparation of original fluorinated β-aminoacids as useful building
Defluorinative Carboimination of Trifluoromethyl Ketones
作者:Xiaolong Zhang、Yongquan Ning、Zhaohong Liu、Shuang Li、Giuseppe Zanoni、Xihe Bi
DOI:10.1021/acscatal.2c02434
日期:2022.8.5
intramolecular cascade process by integrating successive cleavage of the C–Fbond and formation of C–C and C═N bonds on a single molecule entity, which differs relevantly from the stepwise mechanism of reported carbodefluorination of CF3 groups. Mechanistic studies disclose that silver catalysis plays a critical role, particularly in the stages of C–Fbondcleavage and aza-Claisen rearrangement.
Rh-catalyzed asymmetric cyclopropanation of benzofurans with trifluoromethyl N-triftosylhydrazones
作者:Caicai He、Swastik Karmakar、Dandan Wei、Wei Zhao、Xiaolong Zhang、Xihe Bi
DOI:10.1016/j.jfluchem.2023.110237
日期:2024.1
3-disubstituted benzofuran cyclopropane, which carries versatile pharmacophores 2,3-dihydrobenzofuran and trifluoromethyl-substituted quaternary carbon centers. Notably, this process offers distinct advantages over other existing approaches due to being step-economic and eliminating green-gas N2 as a harmless coproduct. DFT calculations explain the reason behind the high enantioselectivity during this cyclopropanation
苯并呋喃的不对称脱芳环丙烷化反应是通过一种新颖的催化方法完成的,该方法依赖于在手性铑催化剂存在下使用三氟甲基N-三甲苯基腙作为卡宾源。该反应产生手性三氟甲基连接的2,3-二取代苯并呋喃环丙烷,其带有通用药效团2,3-二氢苯并呋喃和三氟甲基取代的季碳中心。值得注意的是,由于步骤经济且消除了作为无害副产品的绿色气体 N 2 ,因此该工艺比其他现有方法具有明显的优势。DFT 计算解释了环丙烷化反应中高对映选择性背后的原因。