Treatment of the imine PhC(=NSiMe3)py with Et2BOMe or BF3·Et2O afforded bicyclic ketiminoboranes and via intramolecular N-coordination. The basicity of the imine N is evidenced by their reactivity towards Brønsted and Lewis acids and the structures of ·HCl and ·BF3 are reported as well as the dipyridyl imine derivative ·HCl.

The first total syntheses of the Lycopodium alkaloids (+)-nankakurine A (2), (+)-nankakurine B (3), and the originally purported structure 1 of nankakurine A were accomplished. The syntheses of 2 and 3 feature a demanding intramolecular azomethine imine cycloaddition as the key step for generating the octahydro-3,5-ethanoquinoline moiety and installing the correct relative configuration at the ...

The title compound, C(18)H(12)N(2)O, crystallizes in a phenol-imine tautomeric form with a Z conformation for the imine functionality. The dihedral angle between the aromatic rings is 8.98 (9)°. A strong intra-molecular O-H⋯N hydrogen-bond inter-action between the hydroxyl group and imine N atom occurs.

A new method for imine synthesis by way of quinone-catalyzed oxidative deformylation of 1,2-amino alcohols is reported. A wide range of readily accessible amino alcohols and primary amines can be reacted to provide N-protected imine products. The methodology presented provides a novel organocatalytic approach for imine synthesis and demonstrates the synthetic versatility of quinone-catalyzed ox...

The current assignment depicts the structure of recent quinoline derivatives. This method begins with imine derivatives through condensation reaction ethyl 2-aminobenzoate various substituted aliphatic aldehydes and ketones in existence sodium hydroxide as a catalyst. While second step includes intra-cyclization process compounds presence base like tertiary butoxide that resolute installs hydro...

The synthesis of shape-persistent organic cage compounds is often based on the usage of multiple dynamic covalent bond formation (such as imines) of readily available precursors. By careful choice of the precursors geometry, the geometry and size of the resulting cage can be accurately designed and indeed a number of different geometries and sizes have been realized to date. Despite of this fac...

Two different classes of fluorescent dyes were prepared as a turn off/on sensor system for aldehydes. Amino derivatives of a boron dipyrromethene (BDP) fluorophore and a xanthene-derived fluorophore (rosamine) were prepared. Model compounds of their product with an aldehyde were prepared using salicylaldehyde. Both amino boron dipyrromethene and rosamine derivatives are almost non-fluorescent i...

ortho-Lithiation of N,N-diisopropyl-P,P-diphenylphosphinothioic amide using n-BuLi in the presence of TMEDA in diethyl ether followed by electrophilic trapping is described as an efficient method for the synthesis of ortho-functionalised derivatives in high yields. The structural modification of the phosphinothioic amide includes C-X (X = P, S, Si, Sn, I) and C-C bond forming reactions with a l...

Three imine macrocycles having rhomboidal shape were synthesized in good yields by [2+2] cyclocondensation reaction between equimolar quantities of (R,R)-1,2-diaminocyclohexane and 4,4'-bisformyl triphenylamine derivatives. The macrocycles structure was assigned by electrospray ionization mass spectrometry (ESI-MS), (1)H-NMR, and elemental analysis. UV, FTIR spectroscopy, and TG measurements we...

The oxidative cyclisation of a range of benzothieno[2,3-d]pyrimidine hydrazones (7a-e) to the 1,2,4-triazolo[4,3-c]pyrimidines (8a-e) catalysed by lithium iodide or to the 1,2,4-triazolo[1,5-c]pyrimidines (10a-e) with sodium carbonate is presented. A complementary synthesis of the 1,2,4-triazolo[1,5-c]pyrimidines (10a-e) starting from the amino imine 11 is also reported. The effect of these com...