Zobrazeno 1 - 10
of 29
pro vyhledávání: '"Martin Kamlar"'
Publikováno v:
Beilstein Journal of Organic Chemistry, Vol 17, Iss 1, Pp 2433-2440 (2021)
Here we present an enantioselective aminalization of aldehydes catalyzed by Brønsted acids based on pentacarboxycyclopentadienes (PCCPs). The cyclization reaction using readily available anthranilamides as building blocks provides access to valuable
Externí odkaz:
https://doaj.org/article/48909cac4f164b9f93945e286eced441
Publikováno v:
The Chemical Record.
Publikováno v:
Chemical Communications. 58:9942-9945
Herein, we report the first chiral phosphoric acid (CPA)-catalyzed asymmetric addition of α-fluoro(phenylsulfonyl)methane (FSM) derivatives to in situ generated cyclic N-acyliminium.
Autor:
Martin Kamlar, Pierre-Yves Geant, Jan Veselý, Martin Štícha, Ivana Císařová, Marek Remeš, Martina Šotolová
Publikováno v:
European Journal of Organic Chemistry. 2021:5080-5089
Publikováno v:
Industrial & Engineering Chemistry Research. 60:10056-10063
Two major challenges facing chemical synthesis are product isolation and catalyst recovery. One method to overcome these challenges is to perform the synthesis in a flow system with a catalytic stationary phase. However, the polymeric catalytic mater
Publikováno v:
The Journal of Organic Chemistry
This study explores the synthesis of cyclic cis-vicinal phenyl ethylenes from oxotriphenylhexanoates. The reaction is a BBr3-promoted cyclization of 1,6-ketoesters (1) to five-membered diketo compounds (2). The synthesis is interesting as it constitu
Publikováno v:
Organic Letters
Here we present a polycyclization of oxotriphenylhexanoates. The polycyclization is governed by electronic effects, and three major synthetic paths have been established leading to stereochemically complex tricyclic frameworks with up to five stereog
Publikováno v:
Chemical Communications. 55:3829-3832
The present study reports the asymmetric cyclization of enals with vinylcyclopropane azlactones efficiently catalyzed by the combination of achiral Pd(0) complexes and chiral secondary amines. Corresponding spirocyclic azlactones were produced in hig
Publikováno v:
Synthesis. 51:907-920
An organocatalytic asymmetric allylic amination of Morita–Baylis–Hillman carbonates with aromatic amines in the presence of β-isocupreidine is described. Chiral allylic amines were obtained in almost quantitative yields (90–96%) with moderate
Autor:
Martin Kamlar, Lucie Jašíková, Bedřich Formánek, Marta Meazza, Ramon Rios, Jan Veselý, Jana Roithová, Andrea Mazzanti
Publikováno v:
Chemical Science
We report the first ring contraction/formal [6 + 2] cycloaddition using synergistic Pd(0)/secondary amine catalysis, obtaining [5,5]-spiropyrazolone derivatives in excellent yields and stereoselectivities. We detected the key palladium activated inte