In the title Schiff base mol-ecule, C(13)H(11)ClN(2)O, the non-H atoms are approximately coplanar (r.m.s. deviation = 0.115 Å) and the two benzene rings are twisted by 9.36 (3)° with respect to each other. The hy-droxy group is hydrogen bonded to the azomethine N atom. In the crystal, an N-H⋯π inter-action is observed between the imino group and the hy-droxy-benzene ring of an adjacent mol-ecule.

Lewis base catalysed 1,3-dipolar cycloaddition between α,β-unsaturated acyl fluorides and N-[(trimethylsilyl)methyl]amino ethers has been achieved using 1 mol% DMAP. Competition experiments and (19)F-NMR studies indicate that the cycloaddition occurs preferentially between the α,β-unsaturated acyl fluoride and the unstabilised azomethine ylide. In addition, an enantioselective variant, using ch...

N-[(Diphenylamino)methyl]acetamide was synthesized using Mannich reaction and its complexes of cerium(IV), thorium(IV) and dioxouranium(VI) were prepared and characterized by elemental analysis and various spectral studies. The bidendate chelation of ligand, bonding through carbonyl oxygen and azomethine nitrogen is suggested. Based on spectral and magnetic studies, hexa coordinate geometry is ...

An enantioselective [3 + 2] annulation of donor–acceptor aziridines with aldehydes has been realized using a Nd(OTf)3/N,N0-dioxide/LiNTf2 catalyst system, providing various chiral cis-1,3-oxazolidines inmoderate to good yields with high levels of stereocontrol. A relay catalytic process is proposed where LiNTf2 promotes the formation of azomethine ylide intermediates, and a chiral Nd(III)–N,N0-...

A short synthetic sequence leading to the formation of the C,D,E-ring subunit of the Aspidosperma alkaloids is reported. This route is based on a ring fragmentation/intramolecular azomethine ylide 1,3-dipolar cycloaddition reaction sequence that gives the desired tricyclic product as a single diastereomer. A γ-amino-β-hydroxy-α-diazo carbonyl compound is shown to fragment in the presence of a L...

The structure of the title compound, C(16)H(19)N(3)O(4)S, shows the planes described by the thio-phene and the pyrroles are twisted by 17.06 (4)°. Additionally, the structure shows the azomethine bond adopts the E configuration, while the pyrrole is disordered as a heterocycle flip [occupancy ratio 0.729 (5):0.271 (5)]. The three-dimensional network is well packed and involves N-H⋯O hydrogen bo...

The title compound, C(19)H(15)ClN(2), adopts an E configuration with respect to the position of the chloro-benzene and diphenyl-amine groups on the C=N azomethine bond. The mol-ecule is not planar, the central six-membered ring making angles of 12.26 (10) and 44.18 (11)° with the 4-chloro-phenyl and phenyl rings, respectively. In the crystal structure, weak C-H⋯π inter-actions contribute to the...

The mol-ecule of the centrosymmetric title compound, C(18)H(20)N(2)O(6), assumes an E configuration with respect to the azomethine C=N bond. The imino group is coplanar with the aromatic ring. Intra-molecular O-H⋯O and O-H⋯N bonds are found between the hydroxyl groups and adjacent O (or N) atoms. In the crystal structure, inter-molecular O-H⋯O bonds link each mol-ecule to two others, forming a ...

In the title compound, C(14)H(11)IN(2)O(3)·CH(4)O, the dihedral angle between the benzene rings is 33.2 (3)°. The mol-ecule displays trans and anti conformations about the C=N and N-N bonds, respectively. There is an intra-molecular O-H⋯N(azomethine) hydrogen bond. Inter-molecular N-H⋯O and O-H⋯O hydrogen bonds consolidate mol-ecules into a three-dimensional architecture.