A transition-metal-free umpolung protocol provides structurally diverse α-alkylated benzylic amines under mild reaction conditions
A transition-metal-free umpolung protocol provides structurally diverse α-alkylated benzylic amines under mild reaction conditions
A N-heterocyclic carbene (NHC)-catalyzed synthesis of N-substituted isoindolinone acetates proceeds through a tandem imine umpolung-intramolecular aza-Michael addition followed by oxidation.
A N-heterocyclic carbene (NHC)-catalyzed synthesis of N-substituted isoindolinone acetates proceeds through a tandem imine umpolung-intramolecular aza-Michael addition followed by oxidation.
P(NMe2)3 mediates umpolung alkylation of methyl aroylformates with benzylic and allylic bromides. Depending on the work-up conditions, either Barbier-type addition or ylide-free olefination products can be isolated.
P(NMe2)3 mediates umpolung alkylation of methyl aroylformates with benzylic and allylic bromides. Depending on the work-up conditions, either Barbier-type addition or ylide-free olefination products can be isolated.
Copper catalysis and B2pin2-mediated Umpolung reactivity of propargylic carbonates realize both allylation and propargylation of aldehydes and ketones
Copper catalysis and B2pin2-mediated Umpolung reactivity of propargylic carbonates realize both allylation and propargylation of aldehydes and ketones
#umpolung
👉 buff.ly/JLkYt4I
#umpolung
👉 buff.ly/JLkYt4I
A double umpolung reaction of 2-aminophenyl-3-oxopropanoate enables an efficient and operationally simple one-pot synthesis of a broad range of 2,2-disubstituted indolin-3-ones.
A double umpolung reaction of 2-aminophenyl-3-oxopropanoate enables an efficient and operationally simple one-pot synthesis of a broad range of 2,2-disubstituted indolin-3-ones.
Read it for free here: pubs.rsc.org/doi/D5S...
Read it for free here: pubs.rsc.org/doi/D5S...
"Diastereoselective Umpolung cyclisation of ketones promoted by hypervalent iodine"
You can read the full Chemical Science paper here: lnkd.in/et_eDKrX
Work authored by Nuno Maulide et al.
Link: youtu.be/uyKZgUbB5Fk
Link to our problem sets: synthesis-workshop.com/problem-sets.
"Diastereoselective Umpolung cyclisation of ketones promoted by hypervalent iodine"
You can read the full Chemical Science paper here: lnkd.in/et_eDKrX
Work authored by Nuno Maulide et al.
Der Kantonsrat lässt die «#Umpolung» von #Homosexuellen verbieten
Mein bisher wichtigster Vorstoss
(Hier noch der ganze Artikel. Danke @NZZ)
www.nzz.ch/zuerich/konv...
Der Kantonsrat lässt die «#Umpolung» von #Homosexuellen verbieten
Mein bisher wichtigster Vorstoss
(Hier noch der ganze Artikel. Danke @NZZ)
www.nzz.ch/zuerich/konv...
www.nzz.ch/zuerich/konv...
www.nzz.ch/zuerich/konv...
Alles eine Frage der Skalarresonanz, weiß nur wieder keiner.
Alles eine Frage der Skalarresonanz, weiß nur wieder keiner.
Link: youtu.be/uyKZgUbB5Fk
Link to our problem sets: synthesis-workshop.com/problem-sets.
Link: youtu.be/uyKZgUbB5Fk
Link to our problem sets: synthesis-workshop.com/problem-sets.
Schon jetzt mein Satz des Tages.
Schon jetzt mein Satz des Tages.
Ergebnis: das Modul hat auch bei Umpolung immer auf der plusseite plus und der Minusseite minus. U wird vom Betrag her 5/6
Ergebnis: das Modul hat auch bei Umpolung immer auf der plusseite plus und der Minusseite minus. U wird vom Betrag her 5/6
Authors: Sukanya Das, Sagar Bag, Md Abbasuddin Sk, Priyankar Majumdar, Uttam Kumar Das, ...
DOI: 10.26434/chemrxiv-2025-tn425
Authors: Sukanya Das, Sagar Bag, Md Abbasuddin Sk, Priyankar Majumdar, Uttam Kumar Das, ...
DOI: 10.26434/chemrxiv-2025-tn425