21181-82-8Relevant academic research and scientific papers
A general catalytic hydroamidation of 1,3-dienes: Atom-efficient synthesis of N-allyl heterocycles, amides, and sulfonamides
Banerjee, Debasis,Junge, Kathrin,Beller, Matthias
supporting information, p. 1630 - 1635 (2014/03/21)
Transition-metal-catalyzed hydroamination reactions are sustainable and atom-economical C-N bond-forming processes. Although remarkable progress has been made in the inter- and intramolecular amination of olefins and 1,3-dienes, related intermolecular reactions of amides are still much less known. Control of the regioselectivity without analogous telomerization is the particular challenge in the catalytic hydroamidation of alkenes and 1,3-dienes. Herein, we report a general protocol for the hydroamidation of electron-deficient N-heterocyclic amides and sulfonamides with 1,3-dienes and vinyl pyridines in the presence of a catalyst derived from [{Pd(π-cinnamyl)Cl}2] and ligand L7 or L10. The reactions proceeded in good to excellent yield with high regioselectivity. The practical utility of our method is demonstrated by the hydroamidation of functionalized biologically active substrates. The high regioselectivity for linear amide products makes the procedure useful for the synthesis of a variety of allylic amides. Give me an N bond: A general palladium-catalyzed intermolecular hydroamidation of 1,3-dienes with electron-deficient N-heterocycles, amides, and sulfonamides proceeded with high regioselectivity for 1,4-addition and excellent functional-group tolerance (see scheme). The practical utility of the method was demonstrated by the hydroamidation of functionalized biologically active substrates. Copyright
4-Substituted-1-piperidinesulfonamides
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, (2008/06/13)
A series of novel 1-piperidinesulfonylurea compounds derived from a nitrogen-containing monocarboxylic acid have been prepared by reacting an appropriate sulfamide with an organic isocyanate or a trisubstituted urea equivalent thereof. The sulfamylureas so obtained are useful in therapy as oral hypoglycemic agents. Typical members include those compounds derived from 2-methoxynicotinic acid, of which 1-(bicyclo[2.2.1]hept-5-en-2-yl-endomethyl)-3-{4-[2-(2-methoxynicotinamido)ethyl]-1-piperidinesulfonyl}urea is a most preferred embodiment.
