Towards Continuous Flow, Highly Enantioselective Allylic Amination: Ligand Design, Optimization and Supporting
作者:Dana Popa、Rocío Marcos、Sonia Sayalero、Anton Vidal-Ferran、Miquel A. Pericàs
DOI:10.1002/adsc.200900163
日期:2009.7
(‐CH2OR) has been optimized for the palladium‐catalyzed asymmetric allylic amination. The optimal catalyst (R=CH3), depicting very high catalytic activity and broad scope applicability, has been further modified to include an ω‐alkynyloxy substituent of variable length for polymer supporting via click chemistry, and has been anchored onto slightly cross‐linked azidomethyl poly(styrene). The length of a polymethylene
Palladium-Catalyzed Enantioselective Allylic Substitution in the Presence of Monodentate Furanoside Phosphoramidites
作者:Maciej Majdecki、Janusz Jurczak、Tomasz Bauer
DOI:10.1002/cctc.201402933
日期:2015.3
D‐xylose and optically pure 1,1′‐bi‐2‐naphthol (BINOL), was used as ligands for the palladium‐catalyzed allylic alkylation and amination. The matched pair was formed from D‐xylose‐derivatives and (S)‐BINOL. The asymmetricinduction depends strongly on the substituent at the C5 of the carbohydrate backbone; both bulky 5‐O‐pivaloyl and 5‐deoxy derivatives gave excellent results, whereas ligands with trityl
Pd-catalyzed asymmetric allylic etherification and amination with a wide range of O- and N-nucleophiles using a chiral sulfoxide–phosphine ligand have been developed (up to 97% yield, 98.5% ee).
New spiro phosphinooxazolines for palladium-catalyzed asymmetric allylic amination
作者:Yanfeng Gao、Zhongxuan Qiu、Rui Sun、Nanxing Gao、Guorui Cao、Dawei Teng
DOI:10.1016/j.tetlet.2018.09.044
日期:2018.10
The new conformational rigid spiro phosphinooxazolines 1 were synthesized from 7-bromo-1-indanone. The asymmetric catalytic potential of them was demonstrated in the asymmetric palladium catalyzed allylicamination. High yields and enantioselectivities were obtained with alkylamines.