Biomaterial Database

Gold(I)-catalyzed intramolecular dihydroamination of allenes with N,N'-disubstituted ureas to form bicyclic imidazolidin-2-ones. 2009

Hao Li, and Ross A Widenhoefer

Duke University, Department of Chemistry, French Family Science Center, Durham, North Carolina 27708-0346, USA.

Reaction of N-delta-allenyl urea 1 with a catalytic 1:1 mixture of gold(I) N-heterocyclic carbene complex (5)AuCl [5 = 1,3-bis(2,6-diisopropylphenyl)imidazol-2-ylidine] and AgPF(6) at room temperature for 2 h led to isolation of bicyclic imidazolidin-2-one 4 in 93% yield with >or=98% diastereomeric purity. Gold-catalyzed dihydroamination was effective for a number of N-delta- and N-gamma-allenyl ureas to form the corresponding bicyclic imidazolidin-2-ones in good yield with high diastereoselectivity.

UI	MeSH Term	Description	Entries
D002384	Catalysis	The facilitation of a chemical reaction by material (catalyst) that is not consumed by the reaction.	Catalyses
D003500	Cyclization	Changing an open-chain hydrocarbon to a closed ring. (McGraw-Hill Dictionary of Scientific and Technical Terms, 5th ed)	Cyclizations
D006046	Gold	A yellow metallic element with the atomic symbol Au, atomic number 79, and atomic weight 197. It is used in jewelry, goldplating of other metals, as currency, and in dental restoration. Many of its clinical applications, such as ANTIRHEUMATIC AGENTS, are in the form of its salts.
D000466	Alkadienes	Acyclic branched or unbranched hydrocarbons having two carbon-carbon double bonds.	Diolefins,Pentadienes
D000586	Amination	The creation of an amine. It can be produced by the addition of an amino group to an organic compound or reduction of a nitro group.	Aminations
D013237	Stereoisomerism	The phenomenon whereby compounds whose molecules have the same number and kind of atoms and the same atomic arrangement, but differ in their spatial relationships. (From McGraw-Hill Dictionary of Scientific and Technical Terms, 5th ed)	Molecular Stereochemistry,Stereoisomers,Stereochemistry, Molecular,Stereoisomer
D014508	Urea	A compound formed in the liver from ammonia produced by the deamination of amino acids. It is the principal end product of protein catabolism and constitutes about one half of the total urinary solids.	Basodexan,Carbamide,Carmol
D015394	Molecular Structure	The location of the atoms, groups or ions relative to one another in a molecule, as well as the number, type and location of covalent bonds.	Structure, Molecular,Molecular Structures,Structures, Molecular
D048289	Imidazolidines	Compounds based on reduced IMIDAZOLINES which contain no double bonds in the ring.	Imidazolidine
D019086	Bridged Bicyclo Compounds, Heterocyclic	Heterocyclic compounds that contain two rings that share two non-adjacent atoms in common.	Bicyclo Compounds, Heterocyclic,Heterocyclic Cpds, Bicyclic,Bicyclic Heterocyclic Compounds,Heterocyclic Bicyclo Compounds,Bicyclic Heterocyclic Cpds,Heterocyclic Compounds, Bicyclic