Facile Access to 3-Acylindoles through Palladium-Catalyzed Addition of Indoles to Nitriles: The One-Pot Synthesis of Indenoindolones
作者:Yuanhong Ma、Jingsong You、Feijie Song
DOI:10.1002/chem.201203354
日期:2013.1.21
The palladium‐catalyzed addition of indoles to nitriles affords 3‐acylindoles. The reaction proceeds with high selectivity, wide substrate scope, broadly available starting materials, and an operationally simple procedure. Combination with the palladium‐catalyzed intramolecular oxidative coupling of 3‐indolylarylketone gives access to indenoindolones in a one‐pot synthesis.
Electronic Nature of Ketone Directing Group as a Key To Control C-2 vs C-4 Alkenylation of Indoles
作者:Veeranjaneyulu Lanke、Kiran R. Bettadapur、Kandikere Ramaiah Prabhu
DOI:10.1021/acs.orglett.6b02698
日期:2016.11.4
A novel mode of achieving site selectivity between C-2 and C-4 positions in the indole framework by altering the property of the ketone directing group is disclosed. Methyl ketone, as directing group, furnishes exclusively C-2 alkenylated product, whereas trifluoromethyl ketone changes the selectivity to C-4, indicating that the electronic nature of the directing group controls the unusual choice between
Indole and indazole derivatives, for the treatment and prophylaxis of cerebral disorders, their preparation and their use
申请人:SANKYO COMPANY LIMITED
公开号:EP0562832A1
公开(公告)日:1993-09-29
Compounds of formula (I) :
[in which R¹ and R² are each hydrogen or various organic groups, p is 0, 1, 2 or 3, U is -CO- or -CH(OR³)- where R³ is hydrogen or a hydroxy-protecting group, V is an optionally unsaturated aliphatic hydrocarbon group and W is a nitrogen-containing group] are useful in the treatment and prophylaxis of dementia especially of the Alzheimer's type.
Crenatine (1a), which is a member of a new class of β-carboline alkaloids having an oxygen functionality at the 4-position, was synthesized starting from ethyl 1-benzylindole-2-carboxylate (12a) via cyclization of an elaborated C2-subsitituent to the 3-position of the indole nucleus and aluminum chloride-catalyzed debenzylation of the protected indolic nitrogen. 1-Ethyl-4-hydroxy-9-methyl-β-carboline (26b), a positional isomer of crenatine with regard to the methyl group, was also synthesized through the same methodology.