نتایج جستجو برای: heterocycle
تعداد نتایج: 914 فیلتر نتایج به سال:
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...
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.
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.
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.
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.
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.
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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