N-Heterocycle directing groups lead to selective borylation of indole at C2 or C7 controlled by heterocycle ring size. With five membered groups, is disfavoured due an increased degree distortion.

The cyclo-hexane-1,3-dicarboxyl-ate dianion in the title three-dimensional coordination polymer, [Zn(2)(C(8)H(10)O(4))(2)(C(10)H(8)N(2))](n), has one carboxyl-ate group in an equatorial position and the other in an axial position of the cyclo-hexane ring, which adopts a chair conformation. The carboxyl-ate groups function as bridges to two adjacent Zn(II) atoms, generating a layer motif. Adjace...

The tin(IV) atom in the title compound, [Sn(C(8)H(9))(2)Cl(2)(C(12)H(8)N(2))], is chelated by the N-heterocycle and bonded to two C atoms and two chloride ions in an SnC(2)Cl(2)N(2) octa-hedral coordination environment with the C atoms trans to each other. The dihedral angles between the heterocycle ring system and the benzene rings of the 4-methyl-benzyl groups are 21.20 (12) and 28.71 (11)°.

In the crystal structure of the title coordination polymer/co-crystal, {[ZnCl(2)(C(18)H(18)N(4))]·C(18)H(18)N(4)}(n), the tetrahedrally coordinated Zn(II) ions are linked by the N-heterocycle into a linear chain. Another N-heterocycle present is not coordinated to the metal atom but inter-acts with the chain through N-H⋯N and N-H⋯Cl hydrogen bonds. The butyl chain of the uncoordinated ligand is...

In the centrosymmetric binuclear title compound, [Pb(2)(N(3))(2)(NCS)(2)(C(12)H(8)N(2))(4)], the N-donor atoms of one N-heterocycle and the N-donor atom of a thio-cyanate anion along with the sterically active lone-pair electrons comprise an approximate square; a plane through three atoms of this square is twisted slightly with respect to the square made up of the other four atoms (two from the...

ABSTRACT. One-pot, mild and efficient synthesis of various spiro-nitrogen heterocycle compounds, based on the reaction ninhydrin 1,2-diamino-benzene, (indenoquinoxalin), with N-heterocycle compounds dialkylacetylenedicarboxylates is described. Using this approach, at a temperature 50-60 °C in acetonitrile solvent, can be obtained very high yields.
 
 KEY WORDS: Ninhydrin, 1,2-Diaminob...

The Cu(II) atom in the title compound, [Cu(C(12)H(11)N(2)O(4))(2)(C(10)H(14)N(2)O)(H(2)O)](n), lies in a square plane defined by the O atoms of the carboxyl-ate ions, the N atom of the N-heterocycle and the water mol-ecule. Coordination by an amido O atom of an adjacent N-heterocycle in the apical direction leads to a polymeric chain running along [01[Formula: see text]]. The chain motif is con...

The synthesis of oxazolines and imidazolines was achieved by activation of isocyanides with water. Mechanistic studies show that the organosuperbase proazaphosphatrane is tolerant of water within the reaction medium, with a beneficial and cooperative effect being observed.

The reactivity of an anionic gallium(I) heterocycle, [K(tmeda)][:Ga([N(Ar)C(H)]2)], Ar = C6H3Pr(i)2-2,6, towards sources of elemental chalcogens and diorgano-dichalcogenides has been investigated and comparisons drawn with the reactivity of the valence isoelectronic N-heterocyclic carbene class of ligand. The reactions of the heterocycle with N2O or (Te)PEt3 yielded the dimeric, dianionic galli...