Palladium-Catalyzed Regio-, Enantio-, and Diastereoselective Asymmetric [3 + 2] Cycloaddition Reactions: Synthesis of Chiral Cyclopentyl Phosphonates
作者:Barry M. Trost、Anand H. Shinde、Youliang Wang、Zhijun Zuo、Chang Min
DOI:10.1021/acscatal.9b05073
日期:2020.2.7
The palladium-catalyzed unified approach using in situ-generated Phospha-TMM species to synthesize a diverse array of chiral organophosphorus containing carbo- and heterocyclic compounds in a highly regio-, diastereo- (>20:1 dr), and enantioselective (>99% ee) fashion is being disclosed. The present protocol reveals the potential of the deprotonative phospha-TMM strategy for the synthesis of challenging
High‐Pressure‐Mediated Thiourea‐Organocatalyzed Asymmetric Michael Addition to (Hetero)aromatic Nitroolefins: Prediction of Reaction Parameters by PCP‐SAFT Modelling
作者:Thomas Weinbender、Michael Knierbein、Lukas Bittorf、Christoph Held、Riko Siewert、Sergey P. Verevkin、Gabriele Sadowski、Oliver Reiser
DOI:10.1002/cplu.202000364
日期:2020.6
Thiourea‐organocatalyzed Michael additions of diethyl malonate to various heteroaromatic nitroolefins (13 examples) have been studied under high‐pressure (up to 800 MPa) and ambient pressure conditions. High pressure was conducive to enhanced product yields by a factor of 2–12 at a given reaction time, high reaction rates (reaction times were decreased from 72–24 h down to 4–24 h) and high enantioselectivity
[EN] TRIAMINOPYRIMIDINE DERIVATIVES WITH ANTIPARASITIC ACTIVITY<br/>[FR] DÉRIVÉS DE TRIAMINOPYRIMIDINE PRÉSENTANT UNE ACTIVITÉ ANTIPARASITAIRE
申请人:UNIV DEGLI STUDI DI MODENA E REGGIO EMILIA
公开号:WO2020188437A1
公开(公告)日:2020-09-24
The present invention relates to compounds with a 5-(2-nitroethyI)-2,4,6- triaminopyrimidine structure, derivatised at the 1 position on the ethylene chain with heteroaromatic or phenyl-benzylether rings. The invention also relates to the use of said compounds as antiparasitic agents against infections caused by Trypanosoma brucei and Trypanosoma cruzi.
Enantioselective Michael Addition/Cyclization/Desymmetrization Sequence of Prochiral Cyclic Hemiacetals and Nitroolefins: Synthesis of Chiral Oxygen-Bridged Bicyclic Compounds
作者:Yu-Jie Li、Xue-Jiao Lv、Yan-Kai Liu
DOI:10.1021/acs.orglett.2c03815
日期:2022.12.23
The organocatalytic enantioselective Michael addition of functionalized prochiral cyclic hemiacetals and nitroolefins has been developed under cooperative enamine and hydrogen bond catalysis. The obtained chiral hemiacetal intermediates could be used in the subsequent diastereocontrolled cyclization/desymmetrization divergent process to access (1) 9-oxabicyclo[3.3.1]nonane or 8-oxabicyclo[3.2.1]octane