2019
DOI: 10.1021/acs.joc.8b02943
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Dinuclear Zinc-AzePhenol Catalyzed Asymmetric Aza-Henry Reaction of N-Boc Imines and Nitroalkanes under Ambient Conditions

Abstract: The asymmetric aza-Henry reaction of N-Boc imines and nitroalkanes was realized in the presence of 10 mol % dinuclear zinc-AzePhenol catalysts under ambient conditions. A variety of nitroamines were obtained in good yields (up to 97%) with excellent enantioselectivities (up to 99% ee) and high diasteroselectivity (up to 14:1 dr). Our protocol combined the operational simplicity and mild reaction conditions, thus making the process amenable for technical applications.

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Cited by 26 publications
(18 citation statements)
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“…[72] Recently, Wang and co-workers reported a nitro-Mannich transformation utilizing the dinuclear zinc catalyst derived from AzePhenol L-2 a (Scheme 37 b). [73] Compared to the previous publication using Zn-L-1 a, the use of Zn-L-2 a successfully reduced the catalyst loading down to 5 mol % while retaining the overall product conversion. Moreover, high diastereoselectivity (up to 14:1 dr) was observed using higher-order nitroalkanes, although the process was limited to only aromatic N-Boc imines.…”
Section: Angewandte Chemiementioning
confidence: 84%
See 1 more Smart Citation
“…[72] Recently, Wang and co-workers reported a nitro-Mannich transformation utilizing the dinuclear zinc catalyst derived from AzePhenol L-2 a (Scheme 37 b). [73] Compared to the previous publication using Zn-L-1 a, the use of Zn-L-2 a successfully reduced the catalyst loading down to 5 mol % while retaining the overall product conversion. Moreover, high diastereoselectivity (up to 14:1 dr) was observed using higher-order nitroalkanes, although the process was limited to only aromatic N-Boc imines.…”
Section: Angewandte Chemiementioning
confidence: 84%
“…Recently, Wang and co‐workers reported a nitro‐Mannich transformation utilizing the dinuclear zinc catalyst derived from AzePhenol L‐2 a (Scheme b) . Compared to the previous publication using Zn‐ L‐1 a , the use of Zn‐ L‐2 a successfully reduced the catalyst loading down to 5 mol % while retaining the overall product conversion.…”
Section: Catalytic Asymmetric Addition To Iminesmentioning
confidence: 99%
“…Scheme 55. Aza-Henry reaction of N-Boc aryl aldimines with nitroalkanes in the presence of (S,S)-AzePhenol [83].…”
Section: Aldol Reactionsmentioning
confidence: 99%
“…Kürzlich haben Wang und Mitarbeiter eine Nitro‐Mannich‐Umwandlung unter Einsatz des von AzePhenol L‐2 a abgeleiteten zweikernigen Zink‐Katalysators berichtet (Schema b) . Im Vergleich zur vorausgegangenen Mitteilung unter Verwendung von Zn‐L‐1 a erlaubte der Einsatz von Zn‐L‐2 a unter Beibehaltung des Gesamtumsatzes eine Herabsetzung der Katalysatormenge auf 5 mol %.…”
Section: Katalytische Asymmetrische Addition An Imineunclassified
“…[72] Kürzlich haben Wang und Mitarbeiter eine Nitro-Mannich-Umwandlung unter Einsatz des von AzePhenol L-2 a abgeleiteten zweikernigen Zink-Katalysators berichtet (Schema 37 b). [73] Im Vergleich zur vorausgegangenen Mitteilung unter Verwendung von Zn-L-1 a erlaubte der Einsatz von Zn-L-2 a unter Beibehaltung des Gesamtumsatzes eine Herabsetzung der Katalysatormenge auf 5 mol %. Zudem wurde mit komplexeren Nitroalkanen eine hohe Diastereoselektivität (bis zu 14:1 dr) beobachtet, wenngleich der Prozess auf aromatische N-Boc-Imine begrenzt war.…”
Section: Katalytische Enantioselektive Aza-henry-reaktionunclassified