(3+3)-Annulation of Donor-Acceptor Cyclopropanes with Diaziridines
作者:Alexey O. Chagarovskiy、Vladimir S. Vasin、Vladimir V. Kuznetsov、Olga A. Ivanova、Victor B. Rybakov、Alexey N. Shumsky、Nina N. Makhova、Igor V. Trushkov
DOI:10.1002/anie.201805258
日期:2018.8.6
The first example of (3+3)‐annulation of two different three‐membered rings is reported herein. Donor‐acceptor cyclopropanes in reaction with diaziridines were found to afford perhydropyridazine derivatives in high yields and diastereoselectivity under mild Lewis acid catalysis. The disclosed reaction is applicable for the broad substrate scope and exhibits an excellent functional group tolerance.
Ring Opening of Donor–Acceptor Cyclopropanes with Cyanide Ion and Its Surrogates
作者:Maksim A. Boichenko、Ivan A. Andreev、Alexey O. Chagarovskiy、Irina I. Levina、Sergey S. Zhokhov、Igor V. Trushkov、Olga A. Ivanova
DOI:10.1021/acs.joc.9b03098
日期:2020.1.17
A straightforward method for ringopening of donor-acceptorcyclopropanes with trimethylsilyl cyanide as a surrogate of cyanide ion in the presence of B(C6F5)3 or trifluoromethanesulfonic acid as a catalyst has been developed. The methodology provides a short route to γ-cyanoesters that can be useful synthetic intermediates for the synthesis of diverse bioactive molecules such as glutaric and δ-aminovaleric
(3 + 3)-Cyclodimerization of Donor–Acceptor Cyclopropanes. Three Routes to Six-Membered Rings
作者:Olga A. Ivanova、Ekaterina M. Budynina、Alexey O. Chagarovskiy、Igor V. Trushkov、Mikhail Ya. Melnikov
DOI:10.1021/jo201612w
日期:2011.11.4
The ability of donor acceptor cyclopropanes to (3 + 3)-cyclodimerize is disclosed. It has been found that Lewis acid-induced transformations of 2-(hetero)arylcyclopropane-1,1-dicarboxylates containing electron-abundant aromatic substituents led to the construction of six-membered cyclic systems. Depending on the substrate properties and the Lewis acid applied, three types of products can be obtained: (1) 1,4-diarylcyclohexanes, (2) 1-aryl-1,2,3,4-tetrahydronaphthalenes, and (3) 9,10-dihydroanthracenes.
[3+2] Cyclodimerization of 2-arylcyclopropane-1,1-diesters. Lewis acid induced reversion of cyclopropane umpolung
作者:Alexey O. Chagarovskiy、Olga A. Ivanova、Ekaterina M. Budynina、Igor V. Trushkov、Mikhail Ya. Melnikov
DOI:10.1016/j.tetlet.2011.06.059
日期:2011.8
A novel Lewis acid catalyzed [3+2] cyclodimerization of 2-arylcyclopropane-1,1-dicarboxylates is reported. It is the first example of a reaction wherein a donor-acceptor cyclopropane provides two carbons in a newly formed ring. The described cyclodimerization represents a general convenient approach to polyfunctionalized cyclopentanes. (C) 2011 Elsevier Ltd. All rights reserved.
Protic Ionic Liquid as Reagent, Catalyst, and Solvent: 1‐Methylimidazolium Thiocyanate
作者:Ivan A. Andreev、Nina K. Ratmanova、André U. Augustin、Olga A. Ivanova、Irina I. Levina、Victor N. Khrustalev、Daniel B. Werz、Igor V. Trushkov
DOI:10.1002/anie.202016593
日期:2021.3.29
ring‐opening of donor‐acceptorcyclopropanes. A wide variety of activated cyclopropanes were found to react with 1‐methylimidazolium thiocyanate under mild metal‐free conditions via unusual nitrogen attack of the ambident thiocyanate ion on the electrophilic center of the three‐membered ring affording pyrrolidine‐2‐thiones bearing donor and acceptor substituents at the C(5) and C(3) atoms, respectively