نتایج جستجو برای: heterocycle

تعداد نتایج: 914  

Journal: :Angewandte Chemie 2021

In this Communication, the structure of compound 49 was inadvertently misassigned. The corrected is provided below. This correction further verified by 2D NMR spectroscopy (see revised Supporting Information published online along with Corrigendum). addition, references summarized in new Ref. [34] were originally cited only. These should have been included caption Scheme 1 main manuscript as sh...

2011
Ezzatollah Najafi Mostafa M. Amini Seik Weng Ng

The two cupferronate ions and the N-heterocycle in the mononuclear title compound, [Pb(C(6)H(5)N(2)O(2))(2)(C(12)H(8)N(2))], O,O'- and N,N'-chelate to the Pb(II) atom, the geometry of which is a distorted Ψ-penta-gonal bipyramid.

2012
Gustavo Pozza Silveira Cassandra Bonfante de Carvallho Allen Oliver

The title compound, C(21)H(25)NO(2)S, consists of a five-membered heterocyclic ring, with pendant phenyl groups, an isopropyl group and a thio-ether residue. The thio-ether bonds to the heterocycle via the N atom. The absolute configuration results from an inversion of the configuration of substrate during the synthesis.

Journal: :Chemical communications 2012
Jennifer A Garden Alan R Kennedy Robert E Mulvey Stuart D Robertson

Sodium TMP-zincate, [(TMEDA)Na(TMP)((t)Bu)Zn((t)Bu)], can deproto-zincate N-Boc pyrrolidine at ambient temperature in hexane solution, whereas in toluene the captured α-carbanion of the heterocycle attacks the solvent setting off a cascade of reactions that ultimately produce a pyrrolidine-substituted enolate.

2010
Ian Sean Campbell Kate L. Edler Raleigh W. Parrott Shawn R. Hitchcock Gregory M. Ferrence

The title oxazolidine compound, C(27)H(39)NO(2), was synthesized from N-isopropyl-norephedrine. The dihedral angle between the aromatic rings is 70.33 (5)°. The N atom of the heterocycle is oriented to allow intra-molecular O-H⋯N hydrogen bonding with the hydr-oxy substituent.

Journal: :Organic & biomolecular chemistry 2012
Andrew J A Watson Aoife C Maxwell Jonathan M J Williams

Ruthenium-catalysed hydrogen transfer has been successfully used for the conversion of alcohols into either 2,3-dihydroquinazolines or quinazolines. The choice of reaction conditions allows for the selective formation of either heterocycle and the methodology can also be applied to the sulfonamide analogue.

2009
Chui Lian Tan Kong Mun Lo Seik Weng Ng

In the crystal structure of the title compound, [Sn(C(7)H(6)Cl)(2)Cl(2)(C(12)H(8)N(2))], the Sn(IV) atom is chelated by the N-heterocycle and the metal atom exists in a trans-C(2)SnCl(2)N(2) distorted octa-hedral coordination environment.

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