Domino Cyclodimerization of Indole-Derived Donor-Acceptor Cyclopropanes: One-Step Construction of the Pentaleno[1,6-a,b]indole Skeleton
作者:Olga A. Ivanova、Ekaterina M. Budynina、Alexey O. Chagarovskiy、Eduard R. Rakhmankulov、Igor V. Trushkov、Alexander V. Semeykin、Nikolay L. Shimanovskii、Mikhail Ya. Melnikov
DOI:10.1002/chem.201101687
日期:2011.10.10
The fellowship of the rings: The previously undiscovered ability of indole‐derived donor–acceptorcyclopropanes to involve four reaction centers simultaneously was revealed by their dominocyclodimerization (see scheme). This SnCl4‐induced reaction affords bisindole products with the pentaleno[1,6‐a,b]indole framework. In the course of this process, two new rings, three CC bonds, and four stereocenters
Reductive Knoevenagel Condensation with the Zn–AcOH System
作者:Ekaterina M. Budynina、Konstantin L. Ivanov、Mikhail Ya. Melnikov
DOI:10.1055/s-0040-1705940
日期:2021.4
gram-scale one-pot approach to 2-substituted malonates and related structures is developed, starting from commercially available aldehydes and active methylene compounds. The technique combines Knoevenagelcondensation with the reduction of the C=C bond in the resulting activated alkenes with the Zn–AcOH system. The relative ease with which the C=C bond reduction occurs can be traced to the accepting abilities
Regioselective Hydrogenolysis of Donor–Acceptor Cyclopropanes with Zn-AcOH Reductive System
作者:Konstantin L. Ivanov、Elena V. Villemson、Gennadij V. Latyshev、Stanislav I. Bezzubov、Alexander G. Majouga、Mikhail Ya. Melnikov、Ekaterina M. Budynina
DOI:10.1021/acs.joc.7b01549
日期:2017.9.15
convenient low-cost method for regioselective ring-opening of donor–acceptor cyclopropanes with the Zn-AcOH reductive system was developed. The general character of the method was displayed via efficient reduction of a representative series of 2-(het)arylcyclopropane-1,1-diesters as well as donor–acceptor cyclopropanes with other types of electron-withdrawing activating groups. This method opens a rapid
Reductive Arylation of Arylidene Malonates Using Photoredox Catalysis
作者:Rick C. Betori、Karl A. Scheidt
DOI:10.1021/acscatal.9b03608
日期:2019.11.1
the utilization of these operators in intermolecular radical–radical arylations, while avoiding conjugate addition/dimerization reactivity that is commonly encountered in enone-based photoredox chemistry. This reactivity relies on tertiary amines that serve to both activate the arylidene malonate for single-electron reduction by a proton-coupledelectrontransfer mechanism as well as serve as a terminal
Synthesis and Structure of 4-Het(aryl)-3,5,5-trimethoxycarbonyl-2-pyrrolidones
作者:N. V. Gorodnicheva、E. S. Ostroglyadov、O. S. Vasil’yeva、S. V. Makarenko
DOI:10.1134/s1070363219070260
日期:2019.7
Condensation of 2-het(aryl)-1,1-dimethoxycarbonylethenes with acetylaminomalonic acidester afforded (3R*,4S*)-4-(4-methoxyphenyl)-, (3R*,4S*)-4-(3,4-methylenedioxyphenyl)-, (3R*,4S*)-4-(4-dimethylaminophenyl)-, (3R*,4S*)-4-(2-furyl)-, (3R*,4S*)-4-(indol-3-yl)-, (3R*,4S*)-4-(1-methylindol-3-yl)-, and (3R*,4S*)-4-(1-benzylindol-3-yl)-3,5,5-tris(methoxycarbonyl)-2-pyrrolidones.
2-het(芳基)-1,1-二甲氧基羰基乙烯与乙酰氨基丙二酸酯的缩合得到(3 R *,4 S *)-4-(4-甲氧基苯基)-,(3 R *,4 S *)-4- (3,4-亚甲基二氧苯基)-,(3 R *,4 S *)-4-(4-二甲基氨基苯基)-,(3 R *,4 S *)-4-(2-呋喃基)-,(3 R *,4 S *)-4-(吲哚-3-基)-,(3 R *,4 S *)-4-(1-甲基吲哚-3-基)-和(3 R *,4 S * )-4-(1-苄基吲哚-3-基)-3,5,5-三(甲氧基羰基)-2-吡咯烷酮。