已经开发出一种通用的方法,可通过类似S N 2的反应,将叠氮离子与各种供体-受体环丙烷开环。这种高度区域选择性和立体选择性的过程是通过亲核攻击环丙烷的更取代的C2原子进行的,该中心的构型完全反转。DFT计算结果支持S N2机理,证明环丙烷的相对实验反应性与计算出的能垒之间具有良好的定性相关性。该反应为多种多官能叠氮化物提供了一种简单的方法,产率高达91%。这些叠氮化物具有很高的合成效用,并参与了面向多样性的合成,这是通过已开发的将其转变为五元,六元和七元N杂环以及复杂的环状化合物的多径策略证明的。包括天然产物和药物,如(-)-尼古丁和阿托伐他汀。
Duality of Donor-Acceptor Cyclopropane Reactivity as a Three-Carbon Component in Five-Membered Ring Construction: [3+2] Annulation Versus [3+2] Cycloaddition
作者:Yulia A. Volkova、Ekaterina M. Budynina、Alexey E. Kaplun、Olga A. Ivanova、Alexey O. Chagarovskiy、Dmitriy A. Skvortsov、Victor B. Rybakov、Igor V. Trushkov、Mikhail Ya. Melnikov
DOI:10.1002/chem.201300731
日期:2013.5.17
Quo vadis? The Lewis acid catalyzed reaction of (hetero)aryl‐derived donor–acceptorcyclopropanes with alkenes can be selectively directed along a [3+2] annulation pathway (see scheme). This new process provides convenient and efficient access to indanes and other cyclopentannulated (hetero)arenes, among which polyoxygenated 1‐arylindanes exhibit significant cytotoxicity against several cancer cell
Synthesis of 1‐Substituted Pyrazolines by Reaction of Donor‐Acceptor Cyclopropanes with 1,5‐Diazabicyclo[3.1.0]hexanes
作者:Alexey O. Chagarovskiy、Vladimir V. Kuznetsov、Olga A. Ivanova、Alexander S. Goloveshkin、Irina I. Levina、Nina N. Makhova、Igor V. Trushkov
DOI:10.1002/ejoc.201900579
日期:2019.9
A simple and efficient methodology for the synthesis of 1‐alkyl‐2,3‐dihydropyrazoles and the corresponding tetrahydropyridazines has been proposed. In this process bicyclic diaziridines were used as synthetic equivalent of difficultly accessible unsubstituted 2,3‐dihydropyrazole and unstable unsubstituted tetrahydropyridazine.
A Straightforward Approach to Tetrahydroindolo[3,2-<i>b</i>]carbazoles and 1-Indolyltetrahydrocarbazoles through [3+3] Cyclodimerization of Indole-Derived Cyclopropanes
作者:Olga A. Ivanova、Ekaterina M. Budynina、Victor N. Khrustalev、Dmitriy A. Skvortsov、Igor V. Trushkov、Mikhail Ya. Melnikov
DOI:10.1002/chem.201502287
日期:2016.1.22
A rapid new approach to produce biologically relevant bisindoles, namely indolyltetrahydrocarbazoles and indolo[3,2‐b]carbazoles, has been developed, based on the Ga(OTf)3‐catalyzed [3+3] cyclodimerization of indole‐derived donor–acceptor cyclopropanes. Chemoselectivity of the process depends on the location of the three‐membered ring at the indole core.
基于由吲哚衍生的供体-受体的Ga(OTf)3催化的[3 + 3]环二聚作用,已开发出一种快速的新方法来生产生物学相关的双吲哚,即吲哚基四氢咔唑和吲哚[3,2- b ]咔唑。环丙烷。该过程的化学选择性取决于三元环在吲哚核上的位置。
From Umpolung to Alternation: Modified Reactivity of Donor-Acceptor Cyclopropanes Towards Nucleophiles in Reaction with Nitroalkanes
作者:Ekaterina M. Budynina、Konstantin L. Ivanov、Alexey O. Chagarovskiy、Victor B. Rybakov、Igor V. Trushkov、Mikhail Ya. Melnikov
DOI:10.1002/chem.201504593
日期:2016.3.7
A conceptually newtype of donor–acceptorcyclopropanereactivity towards nucleophiles has been disclosed. An essential characteristic of the process is an unusual nucleophilic attack on the C(3)‐position of a cyclopropane, combined with typical small ring‐opening by cleavage of the C(1)−C(2) bond between the acceptor and the donor. Based on this new reaction between cyclopropane‐1,1‐diesters and nitroalkanes
A bioinspired route to indanes and cyclopentannulated hetarenes via (3+2)-cyclodimerization of donor–acceptor cyclopropanes
作者:Olga A. Ivanova、Ekaterina M. Budynina、Dmitriy A. Skvortsov、Michelle Limoge、Andrei V. Bakin、Alexey O. Chagarovskiy、Igor V. Trushkov、Mikhail Ya. Melnikov
DOI:10.1039/c3cc44475a
日期:——
1-diesters and related stepwise cross-reaction of two different cyclopropanes were developed. These processes provide efficient and highly stereoselective access to polyoxygenated indanes and cyclopentannulated heteroarene derivatives, which display significant cytotoxicity against several lines of cancer cells (IC50 of 10(-6)-10(-5) M) while being non-toxic for normal cells.