Divergent Rearrangements of Cyclopropyl-Substituted Fluoroepoxides Involving C–F Bond Cleavage and Formation
作者:Tao Luo、Rui Zhang、Wei Zhang、Xiao Shen、Teruo Umemoto、Jinbo Hu
DOI:10.1021/ol403644n
日期:2014.2.7
Unprecedented divergent rearrangements of cyclopropyl-substituted fluoroepoxides are reported. In the presence of a catalytic amount of benzoic acid, cyclopropyl-substituted fluoroepoxides efficiently undergo 1,5-fluorine migration. However, when the fluoroepoxides are heated with K2CO3 at 60 °C, 1,2-fluorine migration occurs. The 1,5-fluorine migration is believed to proceed via a carbocation intermediate
据报道,环丙基取代的氟环氧化物发生了前所未有的发散重排。在催化量的苯甲酸存在下,环丙基取代的氟环氧化物有效地经历了1,5-氟的迁移。然而,当将氟环氧化物与K 2 CO 3在60°C下加热时,会发生1,2-氟迁移。据信1,5-氟迁移通过碳正离子中间体进行,而1,2-氟迁移可能涉及紧密的离子对中间体或通过协同过程进行。
Synthesis of Branched Tryptamines via the Domino Cloke–Stevens/Grandberg Rearrangement
作者:Rinat F. Salikov、Konstantin P. Trainov、Anastasia A. Levina、Irina K. Belousova、Michael G. Medvedev、Yury V. Tomilov
DOI:10.1021/acs.joc.6b02578
日期:2017.1.6
ketones leads to formation of tryptamine derivatives. The use of (2-arylcyclopropyl)ethanones in the reactions with model 4-bromophenylhydrazine hydrochloride gives branched tryptamines with aryl groups in the α-position to the amino group, while (2-methylcyclopropyl)ethanone gives a mixture of α- and β-substituted products in a ratio of 1:3. The method was found effective in the synthesis of enantiomerically
alkynes formally participates in [4 + 2] annulations to deliver the naphthol scaffolds. In contrast, herein we disclose the first Rh(III)-catalyzed C–H activation, followed by redox-neutral [3 + 2] annulation of sulfoxonium ylides with 1,3-diynes, which delivers the alkynated indenone derivatives. This protocol features a good functional group tolerance, a broad substrate scope, moderate to excellent yields
Branching tryptamines as a tool to tune their antiproliferative activity
作者:Rinat F. Salikov、Konstantin P. Trainov、Irina K. Belousova、Aleksandr Yu. Belyy、Ulyana Sh. Fatkullina、Regina V. Mulyukova、Liana F. Zainullina、Yulia V. Vakhitova、Yury V. Tomilov
DOI:10.1016/j.ejmech.2017.12.028
日期:2018.1
The influence of a series of tryptamine derivatives on the viability of normal (HEK293) and tumor (HepG2, Jurkat and SH-SY5Y) cells has been evaluated. All tryptamines tested were three different substitution types: C- and N-branching, and indole benzylation. All the derivations enhance the activity of compounds separately, although the effects of different substitutions were not additive. Thus, combinations of C- and N-branchings as well as C-branching and indole benzylation gave little or no increase in activity. (C) 2017 Elsevier Masson SAS. All rights reserved.